Rainbow Bay — Sea temperature now
Sheltered Gold-Coast family beach.
Pleasant water with a light chop and a light breeze — good swimming conditions.
Location
Rainbow 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 Rainbow Bay
The sea in Rainbow Bay peaks in February, when the water averages around 28°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 July at around 22°C, when cold-water swimmers dominate the coast.
Rainbow Bay sits in the Southern Hemisphere, so the warmest sea coincides with the December–February summer and the coolest with July–August.
Rainbow Bay sea temperature history
Long-term climatology for Rainbow Bay shows an annual mean sea temperature of 25°C, ranging from 22°C in winter to 28°C at the summer peak.
The seasonal swing is roughly 6°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 Rainbow 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.
Rainbow Bay sea temperature: frequently asked questions
What is the warmest month to swim in Rainbow Bay?
February is the warmest month in Rainbow Bay, when the sea averages about 28°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Rainbow Bay?
The coldest month in Rainbow Bay is typically July, when the water averages around 22°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Rainbow Bay without a wetsuit?
The main swimming season in Rainbow 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 Rainbow Bay?
Rainbow 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 Rainbow Bay?
The long-term annual mean sea temperature in Rainbow Bay is about 25°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Rainbow Bay?
The live reading at the top of this page shows the current sea temperature in Rainbow 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 ⭐ | 28°C | Hot |
| Mar | 27°C | Hot |
| Apr | 26°C | Hot |
| May | 24°C | Warm |
| Jun | 23°C | Warm |
| Jul | 22°C | Warm |
| Aug | 22°C | Warm |
| Sep | 23°C | Warm |
| Oct | 25°C | Warm |
| Nov | 26°C | Hot |
| Dec | 27°C | Hot |