Boston Tides Today
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Boston runs a mean tidal range of about 9.1 ft. This month the highest water, 11.8 ft, comes on the morning of Nov 26, and the lowest, a -1.4 ft minus tide, on the evening of Nov 26.
| High tide | 5:53 AM | 9.2 ft |
| Low tide | 11:53 AM | 1.2 ft |
| High tide | 6:11 PM | 9.7 ft |
Today on the water at Boston
Today at Boston: high tide at 5:53 AM (9.2 ft) and 6:11 PM (9.7 ft), low tide at 11:53 AM (1.2 ft). The National Weather Service forecast for Tuesday is partly sunny with SW winds 7 mph, 72°F. Sunrise is at 6:18 AM and sunset at 4:36 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| Overnight | Mostly Cloudy | SW 7 mph | 50°F |
| Tuesday | Partly Sunny | SW 7 mph | 72°F |
Forecast: National Weather Service point forecast for this location.
Where Boston is
Boston sits at 42.3539° N, 71.0503° W on the Gulf of Maine, at Boston, MA. The station here is a live gauge in NOAA's National Water Level Observation Network, the reference network the rest of the coast's tide predictions are tied to. It has been in NOAA's records since 1921. The nearest weather station is Boston, MA, a shore station reporting wind and, at most sites, water temperature, right at this station.
The tide at Boston
Boston has a semidiurnal tide: two highs and two lows a day of about the same size, roughly 12 hours 25 minutes apart. This month's predictions average 1.9 high tides a day here. The mean range from lower low to higher high is 10.3 ft, and 9.5 ft between the average high and the average low, a large tide. On an average day the higher high tops the lower high by 0.4 ft and the lower low sits 0.3 ft below the other low. For the water around it: Gulf of Maine tides are semidiurnal and large, 9 ft at Boston rising past 18 ft toward the Bay of Fundy.
About this station
- High tide reaches Boston about 3.7 hours after the moon passes overhead. That lag is local, which is why high water does not line up with the moon.
- Highest water on record: 15.2 ft on Jan 4, 2018.
- Lowest on record: -3.7 ft on Mar 24, 1940.
- The National Weather Service counts 12.5 ft as minor flooding here, 14.5 ft as moderate and 16.0 ft as major.
Datum and source
Heights on this page are feet above mean lower low water (MLLW), the zero NOAA's nautical charts use for soundings. A predicted 0.0 ft low is the average of the lower low each day; a minus tide is water below chart datum, and a 2 ft high means 2 ft more water than the chart shows. NOAA fixes MLLW at Boston from the 1983-2001 National Tidal Datum Epoch; mean higher high water is 10.3 ft above it and mean sea level 5.2 ft. The land survey datum NAVD88, the zero on topographic maps and flood maps, is 5.5 ft above MLLW here, so a water level on this page converts to NAVD88 by subtracting that amount. Source: NOAA CO-OPS station 8443970, a National Water Level Observation Network gauge, established 1921. The tide times and heights are NOAA's official harmonic predictions for this station; TidalMap republishes them daily and does not alter them. The observed line is the gauge's own six-minute water level feed.
Tide stations near Boston
- Charlestown, Charles River entrance: 1.3 mi, tides at about the same time
- Chelsea St. Bridge, Chelsea River: 2.7 mi, tides about 3 min later
- Amelia Earhart Dam, Mystic River: 3.1 mi, tides at about the same time
- Moon Head: 4.3 mi, tides at about the same time
- Deer Island (south end): 4.6 mi, tides at about the same time
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Boston this month: Nov 23, Nov 24, Nov 25, Nov 26, Nov 27, Nov 28. These spring highs push water up into the grass and over the oyster rock; prime for poling into flooded marsh for tailing reds.
🔻 Negative (minus) low tides at Boston this month: Nov 8, Nov 9, Nov 22, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27, Nov 28, Nov 29, Nov 30. These drain the flats and expose the oyster rock, prime for sight-fishing and clamming.
Best fishing times (solunar)
Major and minor solunar windows for Boston, peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).
| Day | Major windows | Minor windows | Score |
|---|---|---|---|
| Today 🌗 | 6:09–8:09 AM 6:34–8:34 PM | 11:08–1:08 AM 12:56–2:56 PM | 47 |
| Wed Nov 4 🌗 | 6:57–8:57 AM 7:22–9:22 PM | 12:22–2:22 AM 1:19–3:19 PM | 61 |
| Thu Nov 5 🌘 | 7:43–9:43 AM 8:08–10:08 PM | 1:34–3:34 AM 1:40–3:40 PM | 73 |
| Fri Nov 6 🌘 | 8:28–10:28 AM 8:53–10:53 PM | 2:44–4:44 AM 2:02–4:02 PM | 83 |
| Sat Nov 7 🌘 | 9:13–11:13 AM 9:38–11:38 PM | 3:53–5:53 AM 2:24–4:24 PM | 91 |
| Sun Nov 8 🌘 | 9:59–11:59 AM 10:24–12:24 AM | 5:01–7:01 AM 2:50–4:50 PM | 97 |
| Mon Nov 9 🌑 | 10:47–12:47 PM 11:12–1:12 AM | 6:08–8:08 AM 3:20–5:20 PM | 99 |
Predictions & observations: NOAA CO-OPS station 8443970. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.
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