Three Cliffs Bay — Sea temperature now
Cliff-flanked tidal Gower bay.
Cool water with a light chop and a light breeze — fresh conditions — a wetsuit is recommended.
Location
Three Cliffs 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 Three Cliffs Bay
The sea in Three Cliffs Bay peaks in August, when the water averages around 17°C.
On average, 0 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Outside peak season the water drops toward 9°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically February at around 8°C, when cold-water swimmers dominate the coast.
Three Cliffs Bay sea temperature history
Long-term climatology for Three Cliffs Bay shows an annual mean sea temperature of 12°C, ranging from 8°C in winter to 17°C at the summer peak.
The seasonal swing is roughly 9°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 Three Cliffs 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.
Three Cliffs Bay sea temperature: frequently asked questions
What is the warmest month to swim in Three Cliffs Bay?
August is the warmest month in Three Cliffs Bay, when the sea averages about 17°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Three Cliffs Bay?
The coldest month in Three Cliffs Bay is typically February, when the water averages around 8°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Three Cliffs Bay without a wetsuit?
The sea in Three Cliffs Bay rarely climbs above 20°C, so a wetsuit is recommended year-round for anything longer than a quick dip.
Do I need a wetsuit in Three Cliffs Bay?
Outside peak summer the water in Three Cliffs Bay drops toward 9°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.
What is the average sea temperature in Three Cliffs Bay?
The long-term annual mean sea temperature in Three Cliffs Bay is about 12°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Three Cliffs Bay?
The live reading at the top of this page shows the current sea temperature in Three Cliffs 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
| Month | Sea | Comfort |
|---|---|---|
| Jan | 9°C | Cold |
| Feb | 8°C | Cold |
| Mar | 8°C | Cold |
| Apr | 9°C | Cold |
| May | 11°C | Cold |
| Jun | 14°C | Bracing |
| Jul | 16°C | Bracing |
| Aug ⭐ | 17°C | Bracing |
| Sep | 16°C | Bracing |
| Oct | 14°C | Bracing |
| Nov | 12°C | Cold |
| Dec | 10°C | Cold |