Nantucket Harbor
Small Craft Advisory until 6 PM.
Right now
updated 1:17 AM
49°F · sets 5:58 PM
gusts 12 kt
High tide 4:55 AM
2.09 ft MLLW · 0.9 ft above prediction
Latest observations plus the current-hour NWS sky forecast. The call itself runs on the hourly forecast; nearby NDBC 44020 observations do not replace it.
Small Craft Advisory issued October 15 at 1:49PM EDT until October 16 at 6:00PM EDT by NWS Boston/Norton MA In effect through 10/16/2026, 6:00:00 PM EDT.
Read the NWS alertGale Watch issued October 15 at 1:49PM EDT until October 17 at 8:00PM EDT by NWS Boston/Norton MA In effect through 10/17/2026, 8:00:00 PM EDT.
Read the NWS alertHow the day develops
Available forecast · 16 kt peak wind · 3 ft peak seas · Steep, close chop
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Right now. Caution. Seas are the limiting factor. 2 feet every 8 seconds, 0.5 feet under your 2.5 foot limit. some sun, wind east 5 knots, comfortably under the limit, tide rising, high tide at 4:55 AM.
Nearby harbors
Nearby boating conditions
Local source coverage
Marine forecast and boating conditions for Nantucket Harbor
An offshore island destination with a well-marked but busy harbor entrance and exposed surrounding waters.
This island harbor in Massachusetts uses Nantucket Sound (44020) for marine observations, Nantucket Island (8449130) for tide predictions, and Nantucket Memorial (KACK) for nearby aviation weather context.
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