Region

Gulf of Maine Sea Surface Temperature & Chlorophyll Charts

Satellite SST, chlorophyll and depth structure for Gulf of Maine. Find the temperature break and color edge before you burn the fuel.

Gulf of Maine bathymetry and named fishing spots base map

Live SST & chlorophyll for Gulf of Maine

This preview shows depth and structure only. Unlock the live satellite water temperature and color layers, updated throughout the day.

Named spots

SpotTypeDepthFrom nearest port
Fundian Valleycanyon––

Nearby buoys

PORTLAND
54°F
air 50°F · wind 6 kt
2026-10-19 12:40 UTC · NOAA NDBC 44007
BOSTON 16 NM East of Boston, MA
57°F
air 53°F · wind 6 kt
2026-10-19 13:00 UTC · NOAA NDBC 44013
NANTUCKET SOUND
59°F
air 54°F · wind 14 kt · seas 2 ft
2026-10-19 12:50 UTC · NOAA NDBC 44020
Jonesport, ME
53°F
wind 12 kt · seas 2 ft
2026-10-19 12:50 UTC · NOAA NDBC 44027
Buoy A01
56°F

2026-10-19 12:30 UTC · NOAA NDBC 44029
Buoy E01
54°F

2026-10-19 12:30 UTC · NOAA NDBC 44032

Latest NOAA NDBC observations. Satellite and in water readings may differ.

Fishing Gulf of Maine

The Gulf of Maine is cold, productive, structure rich water, and it fishes like a basin apart from the rest of the Atlantic. This is a semi enclosed gulf with its own banks, ledges and deep basins, bounded offshore by Georges Bank and the Northeast Channel. Cold, nutrient rich water circulates through here and mixes over the shallow banks, and the result is a fishery built on temperature breaks, tide driven current edges and the color changes where cooler, greener water meets cleaner water. The edges you hunt are often shaped as much by the banks and the tide as by any warm water push from offshore.

Structure is the backbone of this region. Jeffreys Ledge, Platts Bank, Stellwagen Bank and the deeper basins all disrupt current and concentrate bait, and the many ledges and humps scattered through the gulf do the same on a smaller scale. A temperature break or color edge sitting over a ledge or the edge of a bank is far more productive than the same seam over flat, deep bottom. Pairing the SST and chlorophyll layers with the depth contours is how you find where the water and the structure line up.

Seasonally the headline is bluefin tuna, which move into the gulf and onto the banks in the warmer months and are a classic target over Jeffreys and the offshore structure. Cod, haddock, pollock and other groundfish work the ledges and banks through their seasons, and striped bass run the nearshore water in summer. Nothing here is guaranteed. The tuna move with the bait and the water, and seasons and regulations change constantly, so always check current rules.

The weather in the gulf can turn fast and the runs are long, so weigh the forecast with the water. Before you leave, read where the break is sitting, line it up against the ledges and banks, and run to the edge that has structure under it.

What you get with ReelTemps

From the water

★★★★★
I've tried every temp map out there and they all feel like they were built ten years ago. I'm not exactly a tech guy, but this one actually makes sense the second you open it. First time using it, I marked a break in about 30 seconds the night before and boated bluefin right on it the next morning.
CR
Captain RobCharter captain · San Francisco, CA
★★★★★
Used to burn half a tank driving around looking for color change or a solid temp break. Now I check ReelTemps before I leave the dock and I know exactly where I'm going. Less time driving around guessing, more time with lines in the water.
PE
PeteHalf Moon Bay, CA
★★★★★
Albacore season used to mean a couple hours of homework the night before and just hoping it held up. Now I do most of my research that morning and pull it up on my phone if things change once we're out there. Makes calling an audible a lot easier.
KE
KevinBodega Bay, CA

Gulf of Maine FAQ

Why is the Gulf of Maine different from the open Atlantic?
It is a semi enclosed, cold water basin with its own banks, ledges and deep basins. The fishery runs on temperature breaks, tide driven edges and color changes over structure rather than on a warm Gulf Stream push, so the edges often follow the banks and the tide.
Which structure matters most on the chart?
Jeffreys Ledge, Platts Bank, Stellwagen Bank and the deeper basins, along with the many smaller ledges and humps. A temperature or color edge sitting over that structure concentrates bait, which is why the depth contours are drawn with the SST.
When do the bluefin show?
Bluefin tuna typically move into the gulf and onto the banks in the warmer months. They follow the bait and the water, so the timing shifts year to year. Seasons and regulations change, so always check current rules before you target them.
Is the Gulf of Maine chart buoy calibrated?
Yes. There are active NOAA buoys in the gulf, so the satellite SST can be checked against real in water readings. Satellite and in water temperatures can still differ.

Nearby regions

Not for navigation. ReelTemps is a fishing intelligence tool, not a nautical chart. Sea surface temperature data courtesy of NOAA CoastWatch and NASA PO.DAAC. Buoy observations from NOAA NDBC.