Amelia Island water temperature in January
Key facts
The Atlantic off Amelia Island averages 57.9°F in January — cold. Surfers wear a full wetsuit. Wading only for most people. That is 14.7°F below the island’s annual average of 72.6°F, and 4.1°F down from December.
- Average daily high to low
- Ocean temperature
January in the water
January is the bottom of the curve. The ocean has been giving up heat since October and will not turn until March. Surfers are in 4/3 wetsuits with boots; everyone else is in a coat on the sand. The water is also at its clearest of the year — less biology in it, and fewer storms stirring the bottom.
At 57.9°F the sea is 14.7°F below the island’s annual average of 72.6°F. The air reaches 64.3°F in January, a gap of 6.4°F, noticeable for the first thirty seconds and then gone.
What to wear
A full 4/3 wetsuit, and most local surfers add boots. Without neoprene you get minutes, not a session.
Where this number comes from
57.9°F is the mean of every hourly reading for January across 2023, 2024 and 2025 at NOAA CO-OPS station 8720218, Mayport (Bar Pilots Dock), FL — about 30 km south of the island. The Fernandina Beach station on the island has no water-temperature sensor, so no on-island long record exists to average. We would rather say that plainly than publish an on-island figure we cannot support.
A monthly mean is not a forecast. The real ocean in any given January week moves several degrees around this figure, and a hard south-westerly can pull colder water up onto the shelf in a day. For the reading right now, the offshore waverider buoy 41112 (Offshore Fernandina Beach, FL, 17 km ENE) reports water temperature alongside wave height — that is what feeds our surf report and beach conditions.
January against the months either side
| December | January | February | |
|---|---|---|---|
| Sea temperature | 62°F | 57.9°F | 60.3°F |
| Our reading | Brisk | Cold | Cold |
| Air high | 66.3°F | 64.3°F | 66.6°F |
The annual mean is 72.6°F, and the sea lags the air by about two months in both directions — see water temperature by month for why that lag matters more than the raw number.
Next and previous months
Planning a January beach day
Part of Amelia Island water temperature by month.
Frequently asked questions
- What is the water temperature at Amelia Island in January?
- The ocean averages 57.9°F (14.4°C) in January, from three years of hourly NOAA readings at the nearest sensor with a long record — station 8720218, 30 km south of the island. A given week moves several degrees around that.
- Can you swim at Amelia Island in January?
- Cold at 57.9°F. Surfers wear a full wetsuit. Wading only for most people.
- Do you need a wetsuit at Amelia Island in January?
- A full 4/3 wetsuit, and most local surfers add boots. Without neoprene you get minutes, not a session.