Nantucket Harbor at Nantucket (IN MLLW)
Stage at this gauge is reported IN MLLW.
Flood levels
Official flood levels at this gauge: action stage begins at 4.0 ft; minor flooding begins at 5.0 ft; moderate flooding begins at 6.5 ft; major flooding begins at 8.0 ft.
| Action stage | 4.0 ft |
|---|---|
| Minor flooding | 5.0 ft |
| Moderate flooding | 6.5 ft |
| Major flooding | 8.0 ft |
Highest recorded crests
- 7.9 ft on Oct 30, 1991 (historic crest)
- 7.4 ft on Jan 4, 2018 (historic crest)
- 7.2 ft on Jan 27, 2015 (historic crest)
- 6.7 ft on Mar 3, 2018 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 5.0 ft | Roads remain passable. Low lying areas and roads near Nantucket Harbor, including Easy Street, may experience pockets of shallow flooding less than one foot deep. |
|---|---|
| 6.0 ft | Many roads near Nantucket Harbor become impassable with 1 to 2 feet of water and affects access to the ferry terminals. This includes Easy Street, South Beach Street, Easton Street, Walsh Street, Willard Street, and Straight Wharf. |
| 7.0 ft | Many roads near Nantucket Harbor and in the Downtown Historic District become impassable with 2 to 3 feet of water and affects access to the ferry terminals. Flooding affects Easy Street, South Beach Street, Easton Street, Walsh Street, Willard Street, and Straight Wharf. |
| 8.0 ft | This is a degree of flooding rarely seen. Life threatening flooding more than 3 feet deep affects many roads around Nantucket Harbor and in the Downtown Historic District. Road closures and some evacuations can be expected. Flooding also impacts the Atlantic Avenue area on the south side of the island. Large surf will also result in significant beach erosion and debris on coastal roads. |
| 10.0 ft | This is a degree of flooding never experienced before. Life threatening flooding affects roads around Nantucket Harbor and in the Downtown Historic District with flooding more than 3 feet deep. Many road closures and some evacuations can be expected. Flooding also impacts the Atlantic Avenue area on the south side of the island. Large surf will also result in significant beach erosion and debris on coastal roads. |
Forecast office: NWS Norton · River Forecast Center: Northeast River Forecast Center.
A NOAA tide station shares this spot: NANTUCKET, with tide predictions and official flood levels.
Nantucket Harbor at Nantucket (IN MLLW) in your pocket
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Nearby stations and gauges
- NANTUCKET NOAA tide station · 0.0 mi
- Eel Point NOAA tide station · 5.8 mi
- Great Point NOAA tide station · 7.5 mi
- Muskeget Island NOAA tide station · 11.4 mi
- Wasque Point NOAA tide station · 19.1 mi
- Edgartown Harbor near Chappaquiddick Point (IN MLLW) NWS gauge · 22.6 mi