January 16, 2026 — The Gulf of Maine, often referred to as a sea within a sea, extends along the eastern seaboard from Cape Cod, Massachusetts, to New Brunswick, Canada. Teeming with a bounty of fish and lobsters, the watershed serves as a recipe for abundance. Nutrients from the warm Gulf Stream, the cool Labrador Current, and counterclockwise coastal currents gush into the bay, stratifying into varying temperate zones. But things have changed.
The Gulf of Maine is warming at a rate faster than nearly any other ocean surface on the planet, leading to shifts in the distribution of marine species and contributing to sea level rise. Think of it like a bathtub with hot and cold taps. As the Labrador Current weakens, accelerated warming has increasingly been impacting marine life and economic activities on Maine’s working waterfront.
According to the Gulf of Maine Research Institute’s (GMRI) latest report, the watershed experienced its twelfth-warmest year in 2024. Climbing temperatures, though incremental, are poised to have drastic impacts on fisheries and New England communities.
In Hot Water
Maine is combating the effects of global warming in real time and, in doing so, helping researchers better understand the global ocean.
The Gulf of Maine is home to beloved wildlife, from North Atlantic right whales and seabirds to iconic fish stocks and lobsters, all of which are threatened. Warming waters have already affected cold-water species, like herring, which are declining, and warm-water species, like butterfish.
Shifts in the food web have a ripple effect. Puffins are in limbo, forced to change what they feed to their chicks. And invasive species like green crabs have settled in, killing essential eelgrass beds that juvenile crustaceans rely on for protective habitat.
The impact rising tides have on coastal infrastructure are not less noteworthy. In 2020, Maine published its climate action plan, dedicating an entire section to better understand how a warming, rising Gulf will impact marine resources and communities. There’s great emotional value in both sectors, not to mention $528 million in yearly revenue from the state’s lobster industry and $9 billion in tourist revenue.