Half Moon Bay Water Temperature & Swim Forecast
Coastal beach near Freetown.
Live conditions loading.
Location
Half Moon Bay on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Check live temperature
Live water temperature is loading — refresh in a moment for a precise recommendation.
Recommendation tuned for Half Moon Bay's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Half Moon Bay swimming conditions summary
- Water temperature
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- Water feels
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- Swimmable today
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- Swim conditions score
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- Wetsuit needed
- Check live temperature
- Air temperature
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- Waves
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- Wind
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- UV index
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- Warmest months to swim
- July, August, September
Live water temperature is loading — refresh in a moment for a precise recommendation. Live marine data updated hourly from Open-Meteo Marine.
Frequently asked questions
Can I swim at Half Moon Bay right now?
Live data is loading. Use the 7-day forecast above to plan your swim — conditions above 22°C are comfortable for most swimmers.
What will the sea temperature be at Half Moon Bay next week?
Based on long-term August averages and the latest marine model, expect the sea around Half Moon Bay to sit close to 29.0°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.
When is the best month to swim at Half Moon Bay?
July – August – September are typically the warmest months to swim at Half Moon Bay, with sea temperatures at their seasonal peak.
Can I swim at Half Moon Bay today?
Live data is loading. In summer, this beach typically offers comfortable swimming conditions.
- • Located in Saint Philip, Antigua and Barbuda (Atlantic Ocean).
- • Family friendly with calm, accessible water.
- • Live data refreshed hourly from Open-Meteo Marine.
Monthly sea temperature averages
Tap any month to see what to expect — based on regional climatology.
Best time to swim in Half Moon Bay
The sea in Half Moon Bay peaks in July, when the water averages around 29°C.
The main swimming season runs from January – December, when surface temperatures stay comfortable for extended sessions.
On average, 12 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
The coldest month is typically January at around 26°C, when cold-water swimmers dominate the coast.
Half Moon Bay sea temperature history
Long-term climatology for Half Moon Bay shows an annual mean sea temperature of 28°C, ranging from 26°C in winter to 29°C at the summer peak.
The seasonal swing is roughly 3°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.
Recent decades have trended slightly warmer at Half Moon Bay, in line with regional sea-surface temperature records for the wider basin.
Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.
Half Moon Bay sea temperature: frequently asked questions
What is the warmest month to swim in Half Moon Bay?
July is the warmest month in Half Moon Bay, when the sea averages about 29°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Half Moon Bay?
The coldest month in Half Moon Bay is typically January, when the water averages around 26°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Half Moon Bay without a wetsuit?
The main swimming season in Half Moon Bay runs from January – December — about 12 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.
Do I need a wetsuit in Half Moon Bay?
Half Moon Bay stays warm year-round, so most swimmers never need a wetsuit — a rash guard is usually enough for sun and wildlife protection.
What is the average sea temperature in Half Moon Bay?
The long-term annual mean sea temperature in Half Moon Bay is about 28°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Half Moon Bay?
The live reading at the top of this page shows the current sea temperature in Half Moon Bay, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Year-round sea temperature
Best swim months: Jan – Feb – Mar – Apr – May – Jun – Jul – Aug – Sep – Oct – Nov – Dec
| Month | Sea | Comfort |
|---|---|---|
| Jan | 26°C | Hot |
| Feb | 26°C | Hot |
| Mar | 26°C | Hot |
| Apr | 27°C | Hot |
| May | 28°C | Hot |
| Jun | 28°C | Hot |
| Jul ⭐ | 29°C | Hot |
| Aug | 29°C | Hot |
| Sep | 29°C | Hot |
| Oct | 29°C | Hot |
| Nov | 28°C | Hot |
| Dec | 27°C | Hot |
Nearby beaches
The closest coastline, with live water temperatures.