Poipu Beach Sea Temperature
USA · Forecast updated Jul 16, 2026, 05:05 UTC
Current Sea Temperature
26.6°C
79.9°F
Warm water
Versus this month's average
Close to average
The July average in our archive is 26.5°C (79.8°F).
Recent trend
Holding fairly steady
Seven-day average: 26.6°C, versus 26.7°C in the prior seven days.
What to wear
Warm water
Most people are comfortable in swimwear or a light rash guard.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not mean the sea is safe.
Sea Surface Temperature Over the Year
In the data collected for Poipu Beach, monthly averages range from about 26.1°C (79.0°F) in June to 26.5°C (79.8°F) in July.
Over the past 30 days, the average sea temperature in Poipu Beach has been 26.5°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 26.0°C / 78.8°F | 26.1°C / 79.0°F | 26.3°C / 79.3°F |
| July | 26.0°C / 78.8°F | 26.5°C / 79.8°F | 27.0°C / 80.6°F |
Profile calculated from 498 hourly forecast records across 2 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Poipu Beach
Popular south-shore beach with protected pockets, reef fish and frequent turtles.
- Area
- South Shore
- Local timing
- Morning
- Exposure
- South shore; avoid strong south swell
- Entry type
- Sandy beach with protected cove
- Difficulty
- Easy
Poipu Beach Water Temperature — Common Questions
What is the sea temperature in Poipu Beach today?
The current sea surface temperature in Poipu Beach is 26.6°C. Over the last 30 days, the average has been 26.5°C.
When is the water warmest in Poipu Beach?
The warmest monthly average in the Poipu Beach archive is July, at around 26.5°C (79.8°F).
When is the water coldest in Poipu Beach?
The coldest monthly average in the archive is June, at around 26.1°C (79.0°F).
Can you swim in Poipu Beach today?
Yes — at 26.6°C the water is warm enough for comfortable swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Poipu Beach.
View Snorkel Forecast →