// BOURNEMOUTH365
The sea at Bournemouth, measured right now
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
Waiting for the buoy… if this message stays, the live feed is down and we’d rather say so than guess.
Waiting for the buoy…
Waiting for the pier gauge…
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.
The Outdoor Swimming Society’s bands — anecdotal, not scientific, as the OSS itself says. The highlight follows the live measured reading.
Water quality
Waiting for the Environment Agency feed…
Storm overflows
Waiting for the monitor feed…
Sun
Today’s sunrise and sunset, computed for the seafront.
Long-term monthly averages (Cefas station 23 “Bournemouth”, 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.
Sources: the bay’s wave buoy, the Environment Agency tide gauge at Bournemouth Pier and bathing-water service, and Wessex Water’s storm-overflow monitors — details at the foot of this page.
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.
Water quality, 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 |
|---|---|---|---|---|
| Waiting for the Environment Agency feed… | ||||
“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?
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.
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
Bournemouth365 is the web home of our Bournemouth Live Facebook page, where 39,000 of you watch the seafront with us every day. More pages are on the way: live sea conditions measured at the Boscombe wave buoy, an honest local guide to parking for the beach, and the best sunrise and sunset spots — photographed by us, not stock.
Bournemouth365 home · The sea right now · Friday fireworks · Sunrise & sunset · Beach parking · Mobile signal map
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