Salt Whistle Bay — Sea temperature now
Palm-fringed sandy horseshoe on Mayreau.
Very warm water with a light chop and a light breeze — great swimming conditions.
Location
Salt Whistle 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.
Monthly sea temperature averages
Typical year-round water temperature, based on regional climatology.
Best time to swim in Salt Whistle Bay
The sea in Salt Whistle Bay peaks in August, 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 27°C, when cold-water swimmers dominate the coast.
Salt Whistle Bay sea temperature history
Long-term climatology for Salt Whistle Bay shows an annual mean sea temperature of 28°C, ranging from 27°C in winter to 29°C at the summer peak.
The seasonal swing is roughly 2°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 Salt Whistle 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.
Salt Whistle Bay sea temperature: frequently asked questions
What is the warmest month to swim in Salt Whistle Bay?
August is the warmest month in Salt Whistle Bay, when the sea averages about 29°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Salt Whistle Bay?
The coldest month in Salt Whistle Bay is typically January, when the water averages around 27°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Salt Whistle Bay without a wetsuit?
The main swimming season in Salt Whistle 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 Salt Whistle Bay?
Salt Whistle 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 Salt Whistle Bay?
The long-term annual mean sea temperature in Salt Whistle Bay is about 28°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Salt Whistle Bay?
The live reading at the top of this page shows the current sea temperature in Salt Whistle 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 | 27°C | Hot |
| Feb | 27°C | Hot |
| Mar | 27°C | Hot |
| Apr | 27°C | Hot |
| May | 28°C | Hot |
| Jun | 28°C | Hot |
| Jul | 28°C | Hot |
| Aug ⭐ | 29°C | Hot |
| Sep | 29°C | Hot |
| Oct | 28°C | Hot |
| Nov | 28°C | Hot |
| Dec | 27°C | Hot |