// BOURNEMOUTH365
Bournemouth sea temperature, measured right now
Bournemouth sea temperature today: 16.7°C, measured by the Poole Bay wave buoy at 08:30 on Monday 19 October 2026 — 2.5°C above the October long-term average. Sea temperature from the bay’s wave buoy. Tide from the gauge on the pier itself. Water quality from the Environment Agency, storm overflows from Wessex Water’s live monitors. Every reading timestamped — and when a feed is down, we say so.
- ● Measured, not modelled
- ● Every reading timestamped
- ● Updated through the day
// MEASURED, NOT MODELLED
The sea right now
FRESH · SEA STATE · BANDED FROM MEASURED READINGS
Computed from the latest readings: 16.7° water, 0.67m waves — measured at 08:30 on Monday 19 October 2026.
“Fresh” on the swimmers’ scale — doable for the brave without a wetsuit; triathlon wetsuit territory.
Significant height, measured. Mean period 2.7s. From 90° magnetic.
Water level 0.28 m (vs Ordnance Datum) — a real instrument on Bournemouth Pier, not a prediction. Not for navigation or safety-critical use.
The measured curve from the Environment Agency gauge mounted on the pier — not a tide-table prediction. Not for navigation or safety-critical use.
Why the sea is like this today
No usable wave direction is available right now. As a general rule here, refracted waves driven by west and south-westerly weather affect the inshore waters of Poole Bay about 85 percent of the time, arriving bent around Handfast Point from the south and south-east; the rest is mostly sea built over the local southerly and easterly fetches.
Physics: the SCOPAC Poole Bay sediment-transport study.
At 16.7°C measured now: Fresh — doable for the brave without a wetsuit; triathlon wetsuit territory. Bands: the Outdoor Swimming Society’s guide (anecdotal, as the OSS itself says).
All 7 beaches: Excellent
(2025 Environment Agency classification.) Pollution risk forecasts are issued daily May–September; none is in force right now.
No overflows discharging
All 11 monitored storm overflows (5 seafront outfalls, 6 river monitors upstream) are reporting no discharge. Checked at 09:13 on Monday 19 October 2026.
Sun
Today’s sunrise and sunset, computed for the seafront.
Measured now: 16.7° — 2.5° above the October long-term average (Cefas station 23, 1971–2000). The sea lags the air by about two months — September beats June.
Why our number can differ from what Google shows
Most sea-temperature sites publish satellite-derived estimates of open water, sometimes updated daily, sometimes modelled from long-term analysis — and nearshore water can differ from those estimates by several degrees, as those sites’ own disclaimers note. The number above is a physical instrument in the bay reporting a measurement, with the time it was taken. When the instrument is down, we say so rather than switching to a model.
Feed assembled at 09:38 on Monday 19 October 2026 · refreshes every 20 minutes · readings show their own measurement times
Wave and temperature data: Cefas Poole Bay wave buoy (Open Government Licence, acknowledgement to Cefas). Full source list at the foot of the page.
See the buses, flights, road closures and river gauges moving on the live map.
No ads. No paywall. No consent wall. Every reading carries its instrument and its measurement time — built in Bournemouth to load fast on beach 4G.
Can you swim today?
Put the live temperature above against the scale open-water swimmers actually use. The Outdoor Swimming Society’s guide — anecdotal rather than scientific, as the OSS itself says — runs: 0–6°C “Baltic”, 6–11°C “Freezing”, 12–16°C “Fresh”, 17–20°C “summer swimming”, 21°C+ “Warm”.
Two harder numbers sit alongside that. The RNLI defines anything below 15°C as cold water, capable of seriously affecting your breathing and movement — and their advice if you get into trouble is Float to Live: lean back, spread your arms and legs, and let the first minute of cold-water shock pass before you try to swim. And British Triathlon’s 2026 competition rules make wetsuits mandatory below 15.9°C and stop open-water racing entirely below 11°C — a fair guide to where “bracing” ends and “equipment required” begins.
In practice: a Bournemouth August afternoon is usually the friendliest sea of the year, and mid-winter is for the acclimatised, in company, close to shore. If the cold is new to you, build up over weeks of short swims from late spring — and swim between the red-and-yellow flags when lifeguards are on.
How warm the sea gets, month by month
Long-term monthly averages for Bournemouth, from the Cefas Coastal Temperature Network’s station 23 — which is literally named “Bournemouth” (1971–2000 base period; the station record runs to 2012, so treat these as the long-term shape of the year, not this year’s forecast):
| Month | Average sea temp |
|---|---|
| January | 7.4°C |
| February | 6.8°C |
| March | 7.4°C |
| April | 8.9°C |
| May | 11.8°C |
| June | 14.9°C |
| July | 17.4°C |
| August | 18.4°C |
| September | 16.8°C |
| October | 14.2°C |
| November | 11.2°C |
| December | 8.7°C |
The pattern worth knowing: the sea lags the air by around two months. June sunshine sits on May-chilled water, while a grey October day can still offer a 15°C swim — warmer than anything before mid-June. The warmest sea of the year is late August; the coldest is February.
Bournemouth’s odd tide, live from the pier
The tide curve above often shows something tide tables flatten out: a long stand around high water, sometimes a visible double hump. It is not a faulty gauge — it is the English Channel’s geometry. The Channel behaves as a standing-wave system with a node near this coast, and in shallow water the tide’s harmonics distort the simple twice-a-day curve: Christchurch Harbour gets a true double high water on each tide, and Poole shows double highs at springs and a long stand at neaps (Humphreys, Salinity and Tides in Poole Harbour, Proceedings in Marine Science, 2005). Bournemouth sits between the two. Practical upshot: high water hangs around for hours — generous for swimmers, and the reason the beach can feel narrow all afternoon.
Is sewage being discharged into the sea at Bournemouth today?
No — none of the 11 monitored storm overflows around Bournemouth is reporting a discharge (Wessex Water monitors, checked at 09:13 on Monday 19 October 2026).
Statuses as read at 09:13 on 19 October 2026; they refresh live when this page opens.
How that is known: Wessex Water fits every storm overflow around the bay with a monitor that reports a discharge starting or stopping within the hour, and this page reads those monitors every twenty minutes. “No discharge” means exactly that — the monitor has not recorded one — and is not a statement that the water is clean. The Environment Agency’s daily pollution-risk forecast, beach by beach below, is the other half of the answer; after heavy rain it is worth checking both before you go in. Every monitored outfall in Bournemouth, Christchurch and Poole is drawn on the live map, with the beaches and their forecasts alongside.
Is the water at Bournemouth beach clean? Beach by beach
The Environment Agency classifies seven bathing waters along this seafront — Alum Chine, Durley Chine, Bournemouth Pier, Boscombe Pier, Manor Steps, Fisherman’s Walk and Southbourne — and samples each through the May–September season. In season it also issues a daily pollution-risk forecast. The live panel above summarises; this table is per beach:
| Beach | Classification | Today’s risk forecast | Affected by heavy rain? | Nearest outfall monitor | On the map |
|---|---|---|---|---|---|
| Alum Chine | Excellent (2025) | — | no | no discharge · 1.0 km away | Show on map |
| Durley Chine | Excellent (2025) | — | no | no discharge · 1.2 km away | Show on map |
| Bournemouth Pier | Excellent (2025) | — | no | no discharge · 0.5 km away | Show on map |
| Boscombe Pier | Excellent (2025) | — | yes | no discharge · 0.7 km away | Show on map |
| Manor Steps | Excellent (2025) | — | yes | no discharge · 0.8 km away | Show on map |
| Fisherman's Walk | Excellent (2025) | — | no | no discharge · 0.6 km away | Show on map |
| Southbourne | Excellent (2025) | — | no | no discharge · 1.2 km away | Show on map |
“Affected by heavy rain” is the Environment Agency’s own flag: at those beaches, water quality can dip temporarily after a downpour. That is also what the storm-overflow tile above watches — Wessex Water’s live monitors on this stretch of coast, the same feed behind the national Storm Overflow Hub, updated every few minutes. Our honest advice matches the EA’s: after heavy rain, give it a day.
Swim with people who do this every week
Two long-running local groups, both active this year:
Durley Sea Swims — open-water and marathon-swim training from Durley Chine beach (in front of the lifeguard hut), weekend mornings May to September, suggested donation £3 a swim. Founded 2013 to support that year’s English Channel soloists, and still the serious-distance crowd. In the summer holidays they also run Friday-evening swims timed so you finish in the water as the Friday fireworks go up.
Bournemouth Sea Dippers — daily morning dips at Boscombe, six years running, and genuinely welcoming to newcomers. Cold-water dipping rather than distance swimming: short, sociable, year-round.
When the lifeguards are on
RNLI lifeguard patrols for the 2026 season (daily, 10am–6pm): Bournemouth East, Bournemouth West, Boscombe East and Sandbanks from 28 March to 27 September; Durley Chine, Alum Chine, Boscombe West, Fisherman’s Walk, Southbourne and Branksome from 23 May to 6 September; East Cliff and Manor Steps from 18 July to 6 September. Swim between the red-and-yellow flags. 2026 is the 25th year of RNLI lifeguards on these beaches — they began here as a 2001 pilot.
Dogs, barbecues and the rules
The same council rules cover all seven beaches. Dogs: not allowed on any of these beaches from 1 May to 30 September; welcome from 1 October to 30 April, on a lead at all times on promenades, piers, zig zags and footpaths; working guide dogs exempt year-round. Three adjacent stretches stay dog-friendly all year: the western side of Alum Chine towards Branksome Chine, Middle Chine to Durley Chine, and Fisherman’s Walk to Southbourne. Barbecues: disposables only, 6pm to 10:30pm — never gas barbecues, and never open fires, fire pits or fire bowls anywhere on the beaches, promenades or cliffs (fines can reach £1,000). Free electric barbecues run 10am–10pm from early summer to October: the largest bank sits just east of Boscombe Pier (10 standard, 5 accessible), with more at Fisherman’s Walk and Portman Ravine. Put disposables out with water and leave them next to a promenade bin — never buried, never binned hot.
Rules: BCP Council’s dog rules and barbecue rules; lifeguard dates: the RNLI’s 2026 season announcement and per-beach listings — checked 6 August 2026. Rules change; the council’s pages are definitive.
Where every number on this page comes from
Wave and sea-temperature readings: the bay’s wave buoy network — when served from the Boscombe buoy: real-time data from the Regional Coastal Monitoring Programme under the Open Government Licence, not quality-controlled; when served from the Poole Bay buoy: Cefas, under the Open Government Licence. · Tide level: this uses Environment Agency flood and river level data from the real-time data API (Beta), Open Government Licence — not for safety-critical use. · Bathing water: contains Environment Agency bathing water data © Environment Agency and database right, Open Government Licence v3.0. · Storm overflows: Wessex Water Storm Overflow Activity © Wessex Water, CC BY 4.0. · Monthly averages: Cefas Coastal Temperature Network, Station 23 (Bournemouth), 1971–2000 base period. · Sunrise and sunset: computed (NOAA solar position, ±2 minutes). Wave directions are magnetic. Nothing on this page is a model output presented as a measurement.
// GOOD QUESTIONS
Frequently asked
What is the sea temperature at Bournemouth today?
Bournemouth sea temperature today: 16.7°C, measured by the Poole Bay wave buoy at 08:30 on Monday 19 October 2026, 2.5°C above the October long-term average. The live panel at the top of this page shows the current measured reading from the bay’s wave buoy, with the time it was taken. For context, the long-term August average is 18.4°C and February’s is 6.8°C (Cefas station 23, 1971–2000).
Is the sea at Bournemouth clean enough to swim in?
The Environment Agency’s latest classification rates all seven Bournemouth bathing waters Excellent — its top grade. In season it also issues a daily pollution-risk forecast, shown live above, and this page watches Wessex Water’s storm-overflow monitors around the clock. After heavy rain, quality can dip temporarily at some beaches — the honest move is to give it a day.
How warm does the sea get in Bournemouth?
The long-term August average is 18.4°C — the year’s peak — and warm spells push individual readings past 21°C, which is “Warm” on the Outdoor Swimming Society’s scale. The sea lags the air by about two months, so early summer is much colder than it looks.
Do I need a wetsuit to swim at Bournemouth?
Depends on the month and on you. British Triathlon’s 2026 rules make wetsuits mandatory in competition below 15.9°C — Bournemouth’s sea is typically below that from November to mid-June. The RNLI defines anything under 15°C as cold water. In high summer most swimmers go without; the rest of the year, a wetsuit is the sensible default unless you are acclimatised.
Is sewage being discharged into the sea at Bournemouth right now?
At 09:13 on Monday 19 October 2026, none of the 11 monitored storm overflows around Bournemouth was reporting a discharge (Wessex Water monitors). This page reads Wessex Water’s storm-overflow monitors and answers that in one line above, under the heading of the same name, with the time the monitors were checked. Each monitor reports a discharge starting or stopping within the hour. ‘No discharge’ is not a statement that the water is clean — the Environment Agency’s daily pollution-risk forecast, shown beach by beach, is the other half — and after heavy rain it is worth checking both before you go in. The live map draws every monitored outfall in Bournemouth, Christchurch and Poole, with the beaches and their forecasts alongside.
Where does this page’s data actually come from?
Physical instruments: the bay’s wave buoy (temperature and waves), the Environment Agency’s tide gauge mounted on Bournemouth Pier, the EA’s bathing-water sampling and daily risk forecasts, and Wessex Water’s storm-overflow monitors. Every reading is shown with the time it was measured — and when a feed is down, the page says so instead of guessing.
// BOURNEMOUTH365
Bournemouth, 365 days a year
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