Block Island (Old Harbor) Tides Today
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Block Island (Old Harbor) runs a mean tidal range of about 2.8 ft. This month the highest water, 4.0 ft, comes on the morning of Nov 25, and the lowest, a -0.5 ft minus tide, on the morning of Nov 26.
| High tide | 3:20 AM | 3.1 ft |
| Low tide | 9:54 AM | 0.3 ft |
| High tide | 3:47 PM | 2.9 ft |
| Low tide | 10:13 PM | 0.1 ft |
Today on the water at Block Island (Old Harbor)
Today at Block Island (Old Harbor): high tide at 3:20 AM (3.1 ft) and 3:47 PM (2.9 ft), low tide at 9:54 AM (0.3 ft) and 10:13 PM (0.1 ft). The National Weather Service forecast for today is sunny with SW winds 12 mph, 64°F. Sunrise is at 6:19 AM and sunset at 4:39 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| Today | Sunny | SW 12 mph | 64°F |
| Tonight | Partly Cloudy | SW 10 mph | 59°F |
Forecast: National Weather Service point forecast for this location.
Where Block Island (Old Harbor) is
Block Island (Old Harbor) sits at 41.1733° N, 71.5567° W on the southern New England coast, about 13 mi southeast of Quonochontaug, RI, in Washington County. The station here is a historical NOAA reference station: a gauge measured the tide at this spot from 1987 until 1989, and NOAA still publishes harmonic predictions from that record. There is no live reading here today. The closest gauge measuring live water level is Montauk, Fort Pond Bay (NOAA 8510560), 22.7 mi away, and high and low water here run on average about 103 min earlier than there. The nearest weather station is Block Island State Airport, an airport reporting wind, visibility and sky cover, but no water temperature, 1.2 mi away.
The tide at Block Island (Old Harbor)
Block Island (Old Harbor) 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 3.2 ft, and 2.9 ft between the average high and the average low, a moderate tide. On an average day the higher high tops the lower high by 0.2 ft and the lower low sits 0.1 ft below the other low. For the water around it: Tides along Narragansett Bay, Buzzards Bay and the islands are semidiurnal but vary sharply over short distances, from 1 ft on Nantucket Sound to 4 ft in Narragansett Bay.
About this station
- High tide reaches Block Island (Old Harbor) about 0.1 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: 5.2 ft on Oct 22, 1988.
- Lowest on record: -2.2 ft on Feb 9, 1989.
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 Block Island (Old Harbor) from the 1983-2001 National Tidal Datum Epoch; mean higher high water is 3.2 ft above it and mean sea level 1.5 ft. These datums are controlled from NOAA's Newport, RI gauge. Source: NOAA CO-OPS station 8459338, established 1987, gauge removed 1989. The tide times and heights are NOAA's official harmonic predictions for this station; TidalMap republishes them daily and does not alter them.
Tide stations near Block Island (Old Harbor)
- Point Judith, Harbor of Refuge: 13.6 mi, tides about 18 min later
- Newport: 25.8 mi, tides at about the same time
- Quonset Point: 29.6 mi, tides about 5 min later
- East Greenwich: 34.5 mi, tides at about the same time
- Anthony Point: 36.8 mi, tides at about the same time
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Block Island (Old Harbor) this month: Nov 7, Nov 8, 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 Block Island (Old Harbor) this month: Nov 21, Nov 22, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27, Nov 28, Nov 29. 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 Block Island (Old Harbor), 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 🌗 | 6:59–8:59 AM 7:24–9:24 PM | 12:25–2:25 AM 1:21–3:21 PM | 61 |
| Thu Nov 5 🌘 | 7:45–9:45 AM 8:10–10:10 PM | 1:36–3:36 AM 1:43–3:43 PM | 73 |
| Fri Nov 6 🌘 | 8:30–10:30 AM 8:55–10:55 PM | 2:45–4:45 AM 2:05–4:05 PM | 83 |
| Sat Nov 7 🌘 | 9:15–11:15 AM 9:40–11:40 PM | 3:53–5:53 AM 2:29–4:29 PM | 91 |
| Sun Nov 8 🌘 | 10:01–12:01 PM 10:26–12:26 AM | 5:00–7:00 AM 2:55–4:55 PM | 97 |
| Mon Nov 9 🌑 | 10:49–12:49 PM 11:14–1:14 AM | 6:06–8:06 AM 3:27–5:27 PM | 99 |
| Tue Nov 10 🌑 | 11:39–1:39 PM 12:04–2:04 AM | 7:10–9:10 AM 4:04–6:04 PM | 99 |
Predictions & observations: NOAA CO-OPS station 8459338. 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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