Napili Bay Sea Temperature
USA · Forecast updated Jul 15, 2026, 06:20 UTC
Current Sea Temperature
26.9°C
80.4°F
Warm water
Versus this month's average
Close to average
The July average in our archive is 26.7°C (80.1°F).
Recent trend
Holding fairly steady
Seven-day average: 26.7°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 Napili Bay, monthly averages range from about 26.5°C (79.6°F) in June to 26.7°C (80.1°F) in July.
Over the past 30 days, the average sea temperature in Napili Bay has been 26.7°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 25.9°C / 78.6°F | 26.5°C / 79.6°F | 27.3°C / 81.1°F |
| July | 26.5°C / 79.7°F | 26.7°C / 80.1°F | 27.3°C / 81.1°F |
Profile calculated from 1070 hourly forecast records across 2 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Napili Bay
A gentle crescent bay on West Maui, Napili is a beginner-friendly snorkeling spot with green sea turtles and reef along both points. Calmest in the early morning and during lighter summer swells.
- Area
- Maui, Hawaii
Napili Bay Water Temperature — Common Questions
What is the sea temperature in Napili Bay today?
The current sea surface temperature in Napili Bay is 26.9°C. Over the last 30 days, the average has been 26.7°C.
When is the water warmest in Napili Bay?
The warmest monthly average in the Napili Bay archive is July, at around 26.7°C (80.1°F).
When is the water coldest in Napili Bay?
The coldest monthly average in the archive is June, at around 26.5°C (79.6°F).
Can you swim in Napili Bay today?
Yes — at 26.9°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 Napili Bay.
View Snorkel Forecast →