Nantucket, MA

Today’s Forecast:

Today’s Report:

About Nantucket

The representative forecast point covers the main visitor approach, but conditions can differ across water, shorelines, forest interiors, distant access points. Important decisions involve ferry and flight disruption, harbor versus Atlantic conditions, fog, surf, biking exposure, golf and limited shelter.

Planning an Outing at Nantucket

Check the exact marina or authorized launch, paddling access, fishing access, route, course, event notice that applies to the chosen activity. The observation near Nantucket Town should not be treated as proof of conditions across the entire coverage area.

Weather Tips for Nantucket

• Leave open water, shorelines, golf courses, exposed event areas when thunder is heard.
• Check wind, visibility, access and seasonal operations shortly before departure.
• Carry layers, sun protection and enough water for humidity, wind and rapid temperature changes.
• Follow official closures, wildlife restrictions and emergency instructions.

Nearby Towns and Areas

Use this forecast as practical context for plans near:

• Nantucket Town
• Madaket
• Siasconset
• Great Point
• Nantucket Harbor
• Surfside

Adjust the Day to the Forecast

Use a protected harborfront or short town route when Atlantic surf or fog closes the main plan; prolonged ferry or flight disruption requires postponement rather than an improvised exposed trip.

7-Day Forecast for Nantucket, MA

Nantucket Weather by Season

Winter

Winter wind, reduced transport and limited services make small disruptions consequential; snow can drift on exposed roads.

Spring

Dense fog and cold water remain common while ferries, rentals and courses move toward full schedules.

Summer

Sea breeze offers little protection from lightning, rip currents or heat on long exposed bike routes.

Fall

Tropical systems and nor’easters can flood low areas, erode beaches and interrupt transport well beyond the storm center.

Key Climate Data Points

• Local climate: Nantucket marine climate; annual mean temperature about 52–54°F; roughly 43–47 inches precipitation; around 15–25 inches snow; fog and wind can interrupt transport in any season.
• Warmest period: August is warmest, with strong maritime moderation, frequent breeze and fog that can hold temperatures below the mainland.
• Coolest period: January is coldest; snowfall is comparatively limited, but open-ocean wind and transportation disruption can be severe.
• Primary storm or hazard season: Nor’easters, tropical systems, coastal flooding and prolonged fog can isolate the island or alter harbor and beach access.
• Best general outdoor window: July through September offers the warmest water and broadest services, while every trip still depends on ferry or flight conditions.