Month-specific sea-surface temperature · USA
Maui Sea Temperature in January
25.3°C
77.5°F
In January, sea-surface temperature near Maui has a historical monthly average of 25.3°C. This is not the reading for any particular holiday date.
Across 2022–2025, the lowest and highest yearly January monthly means were 25.2–25.5°C. These are not daily extremes.
Previous month
December · 25.9°C
Change into January: -0.6°C
Next month
February · 24.7°C
Change into next month: -0.6°C
Can you swim or snorkel in Maui in January?
At 25.3°C our temperature-only guide describes the water as warm water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.
Do you need a wetsuit?
Most people are comfortable in swimwear or a light rash guard.
Which beach should you choose?
Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.
Maui sits in the Pacific and its reefs usually have 24-28 °C water for much of the year. South and West Maui are often warmer and calmer than the exposed north shore in summer. Trade winds often rise in the afternoon, so mornings may be calmer.
Check the current waves, wind and snorkeling forecast →
A live forecast does not predict a future January. Check again close to your trip.
Waves and wind: recorded-model conditions for January
These figures come from a separately modelled, date-specific wind/wave backfill, not the NOAA SST series. A single observed season is not a climatological likelihood or a guarantee of safe conditions.
Morning calm hours
70%
Afternoon calm hours
68%
Historical coverage
January 2026
31 valid days
A “calm hour” meets fixed modelled wave/wind thresholds; neither visibility nor local currents, entry conditions or actual beach safety is measured here. Periods may differ by coast.
Nearby places in January
Comparable historical averages from independent marine grid cells. Warmer water does not imply safe snorkeling.
- Hawaii 25.4°C
Data source and limitations
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2022–2025. Marine model grid near 20.80, -156.33. Based on 3 yearly monthly means and 2166 recorded samples. Source methodology.
Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.