How's the tide at Block Island today?
High water today at 4:59 am (2.7 ft) and 5:34 pm (3.6 ft). Low water at 10:44 am (0.1 ft).
Times are local to Block Island (America/New_York). Heights are feet above MLLW.
Block Island tide chart — next seven days
Today — Sunday, August 9
| Tide | Time | Height | Relative height |
|---|---|---|---|
| High | 4:59 am | 2.7 ft | |
| Low | 10:44 am | 0.1 ft | |
| High | 5:34 pm | 3.6 ft |
Three turns fall on this date. The next one lands after midnight and is listed under the following day.
Monday, August 10
| Tide | Time | Height | Relative height |
|---|---|---|---|
| Low | 12:26 am | 0.1 ft | |
| High | 6:03 am | 3.0 ft | |
| Low | 11:55 am | 0.0 ft | |
| High | 6:33 pm | 3.8 ft |
Tuesday, August 11
| Tide | Time | Height | Relative height |
|---|---|---|---|
| Low | 1:16 am | -0.1 ft | |
| High | 6:58 am | 3.3 ft | |
| Low | 12:56 pm | -0.2 ft | |
| High | 7:26 pm | 3.9 ft |
Wednesday, August 12
| Tide | Time | Height | Relative height |
|---|---|---|---|
| Low | 2:04 am | -0.2 ft | |
| High | 7:51 am | 3.5 ft | |
| Low | 1:53 pm | -0.3 ft | |
| High | 8:16 pm | 3.9 ft |
Thursday, August 13
| Tide | Time | Height | Relative height |
|---|---|---|---|
| Low | 2:46 am | -0.3 ft | |
| High | 8:40 am | 3.6 ft | |
| Low | 2:45 pm | -0.3 ft | |
| High | 9:02 pm | 3.8 ft |
Friday, August 14
| Tide | Time | Height | Relative height |
|---|---|---|---|
| Low | 3:25 am | -0.3 ft | |
| High | 9:28 am | 3.7 ft | |
| Low | 3:32 pm | -0.2 ft | |
| High | 9:47 pm | 3.6 ft |
Saturday, August 15
| Tide | Time | Height | Relative height |
|---|---|---|---|
| Low | 3:59 am | -0.2 ft | |
| High | 10:14 am | 3.7 ft | |
| Low | 4:17 pm | 0.0 ft | |
| High | 10:30 pm | 3.4 ft |
Block Island tides — month by month
Every high and low water for August 2026 and September 2026.
Block Island tide calendar — August 2026
| Day | High water | Low water |
|---|---|---|
| 1 Sat | 10:05 am (3.1), 10:20 pm (3.1) | 3:52 am (0.1), 3:54 pm (0.3) |
| 2 Sun | 10:45 am (3.1), 11:00 pm (3.0) | 4:18 am (0.1), 4:34 pm (0.4) |
| 3 Mon | 11:28 am (3.2), 11:46 pm (2.9) | 4:50 am (0.1), 5:20 pm (0.5) |
| 4 Tue | 12:16 pm (3.2) | 5:28 am (0.1), 6:16 pm (0.6) |
| 5 Wed | 12:37 am (2.7), 1:08 pm (3.3) | 6:15 am (0.2), 7:27 pm (0.6) |
| 6 Thu | 1:33 am (2.6), 2:05 pm (3.3) | 7:10 am (0.2), 9:01 pm (0.6) |
| 7 Fri | 2:36 am (2.6), 3:11 pm (3.3) | 8:12 am (0.3), 10:25 pm (0.5) |
| 8 Sat | 3:47 am (2.6), 4:25 pm (3.4) | 9:24 am (0.2), 11:30 pm (0.3) |
| 9 Sun · today | 4:59 am (2.7), 5:34 pm (3.6) | 10:44 am (0.1) |
| 10 Mon | 6:03 am (3.0), 6:33 pm (3.8) | 12:26 am (0.1), 11:55 am (0.0) |
| 11 Tue | 6:58 am (3.3), 7:26 pm (3.9) | 1:16 am (-0.1), 12:56 pm (-0.2) |
| 12 Wed | 7:51 am (3.5), 8:16 pm (3.9) | 2:04 am (-0.2), 1:53 pm (-0.3) |
| 13 Thu | 8:40 am (3.6), 9:02 pm (3.8) | 2:46 am (-0.3), 2:45 pm (-0.3) |
| 14 Fri | 9:28 am (3.7), 9:47 pm (3.6) | 3:25 am (-0.3), 3:32 pm (-0.2) |
| 15 Sat | 10:14 am (3.7), 10:30 pm (3.4) | 3:59 am (-0.2), 4:17 pm (0.0) |
| 16 Sun | 11:00 am (3.6), 11:14 pm (3.1) | 4:30 am (-0.1), 5:02 pm (0.2) |
| 17 Mon | 11:46 am (3.4), 11:58 pm (2.7) | 4:57 am (0.1), 5:50 pm (0.5) |
| 18 Tue | 12:33 pm (3.1) | 5:28 am (0.4), 6:49 pm (0.7) |
| 19 Wed | 12:45 am (2.5), 1:22 pm (2.9) | 6:05 am (0.6), 7:59 pm (0.8) |
| 20 Thu | 1:34 am (2.3), 2:16 pm (2.7) | 6:52 am (0.7), 9:10 pm (0.9) |
| 21 Fri | 2:30 am (2.1), 3:23 pm (2.6) | 7:49 am (0.9), 10:17 pm (0.9) |
| 22 Sat | 3:42 am (2.1), 4:38 pm (2.7) | 9:04 am (0.9), 11:13 pm (0.9) |
| 23 Sun | 4:56 am (2.2), 5:36 pm (2.8) | 10:36 am (0.8) |
| 24 Mon | 5:49 am (2.3), 6:20 pm (2.9) | 12:01 am (0.7), 11:36 am (0.7) |
| 25 Tue | 6:31 am (2.5), 6:57 pm (3.1) | 12:42 am (0.6), 12:23 pm (0.5) |
| 26 Wed | 7:08 am (2.8), 7:31 pm (3.2) | 1:19 am (0.4), 1:06 pm (0.3) |
| 27 Thu | 7:43 am (3.0), 8:03 pm (3.3) | 1:52 am (0.3), 1:46 pm (0.2) |
| 28 Fri | 8:19 am (3.2), 8:38 pm (3.3) | 2:20 am (0.1), 2:24 pm (0.2) |
| 29 Sat | 8:56 am (3.4), 9:15 pm (3.3) | 2:45 am (0.0), 3:01 pm (0.1) |
| 30 Sun | 9:35 am (3.5), 9:54 pm (3.2) | 3:11 am (0.0), 3:39 pm (0.2) |
| 31 Mon | 10:16 am (3.5), 10:37 pm (3.1) | 3:41 am (0.0), 4:18 pm (0.2) |
Times local to Block Island, heights in feet above MLLW.
Block Island tide calendar — September 2026
| Day | High water | Low water |
|---|---|---|
| 1 Tue | 11:01 am (3.5), 11:25 pm (2.9) | 4:16 am (0.0), 5:03 pm (0.4) |
| 2 Wed | 11:51 am (3.5) | 4:58 am (0.1), 6:00 pm (0.5) |
| 3 Thu | 12:19 am (2.8), 12:47 pm (3.4) | 5:47 am (0.2), 7:27 pm (0.6) |
| 4 Fri | 1:19 am (2.6), 1:50 pm (3.3) | 6:48 am (0.3), 9:05 pm (0.6) |
| 5 Sat | 2:25 am (2.6), 3:01 pm (3.2) | 8:01 am (0.4), 10:19 pm (0.5) |
| 6 Sun | 3:38 am (2.7), 4:18 pm (3.3) | 9:32 am (0.4), 11:18 pm (0.3) |
| 7 Mon | 4:50 am (2.9), 5:26 pm (3.4) | 10:57 am (0.2) |
| 8 Tue | 5:51 am (3.1), 6:21 pm (3.6) | 12:09 am (0.2), 12:01 pm (0.0) |
| 9 Wed | 6:44 am (3.4), 7:10 pm (3.7) | 12:55 am (0.0), 12:55 pm (-0.1) |
| 10 Thu | 7:33 am (3.7), 7:55 pm (3.7) | 1:36 am (-0.1), 1:45 pm (-0.2) |
| 11 Fri | 8:19 am (3.8), 8:38 pm (3.6) | 2:13 am (-0.2), 2:31 pm (-0.2) |
| 12 Sat | 9:02 am (3.8), 9:19 pm (3.4) | 2:46 am (-0.2), 3:12 pm (-0.1) |
| 13 Sun | 9:44 am (3.7), 9:59 pm (3.2) | 3:14 am (-0.1), 3:50 pm (0.1) |
| 14 Mon | 10:24 am (3.5), 10:39 pm (2.9) | 3:40 am (0.0), 4:26 pm (0.3) |
| 15 Tue | 11:05 am (3.3), 11:21 pm (2.7) | 4:07 am (0.2), 5:02 pm (0.5) |
| 16 Wed | 11:48 am (3.0) | 4:40 am (0.4), 5:45 pm (0.7) |
| 17 Thu | 12:06 am (2.4), 12:35 pm (2.8) | 5:19 am (0.7), 6:55 pm (0.9) |
| 18 Fri | 12:56 am (2.3), 1:30 pm (2.6) | 6:07 am (0.8), 8:31 pm (1.0) |
| 19 Sat | 1:53 am (2.1), 2:36 pm (2.5) | 7:10 am (1.0), 9:44 pm (1.0) |
| 20 Sun | 3:01 am (2.1), 3:57 pm (2.6) | 8:37 am (1.0), 10:41 pm (0.9) |
| 21 Mon | 4:19 am (2.2), 5:00 pm (2.7) | 10:20 am (0.9), 11:26 pm (0.7) |
| 22 Tue | 5:15 am (2.4), 5:44 pm (2.9) | 11:17 am (0.7) |
| 23 Wed | 5:57 am (2.7), 6:20 pm (3.0) | 12:04 am (0.5), 12:03 pm (0.5) |
| 24 Thu | 6:33 am (3.0), 6:54 pm (3.2) | 12:36 am (0.4), 12:45 pm (0.3) |
| 25 Fri | 7:09 am (3.3), 7:30 pm (3.3) | 1:04 am (0.2), 1:25 pm (0.1) |
| 26 Sat | 7:46 am (3.5), 8:08 pm (3.3) | 1:32 am (0.0), 2:05 pm (0.0) |
| 27 Sun | 8:25 am (3.7), 8:48 pm (3.3) | 2:01 am (-0.1), 2:44 pm (0.0) |
| 28 Mon | 9:07 am (3.8), 9:31 pm (3.2) | 2:34 am (-0.2), 3:24 pm (0.0) |
| 29 Tue | 9:51 am (3.8), 10:18 pm (3.1) | 3:10 am (-0.2), 4:06 pm (0.1) |
| 30 Wed | 10:39 am (3.7), 11:09 pm (2.9) | 3:51 am (-0.1), 4:54 pm (0.2) |
Times local to Block Island, heights in feet above MLLW.
Wind and weather at Block Island
Seven days from the National Weather Service forecast for this stretch of coast. Each row is the range across the whole day, not a reading for one moment.
| Day | Wind | Gusts | Air | Sky | Rain |
|---|---|---|---|---|---|
| Today | 5–12 kn WSW | 15 kn | 76–83 °F | Mostly sunny | 1 % |
| Mon, August 10 | 2–10 kn SSW | 14 kn | 70–79 °F | Mostly sunny | 16 % |
| Tue, August 11 | 6–12 kn W | 15 kn | 71–79 °F | Mostly sunny | 10 % |
| Wed, August 12 | 4–9 kn SSW | 11 kn | 71–76 °F | Mostly sunny | 7 % |
| Thu, August 13 | 7–13 kn SW | 16 kn | 69–76 °F | Partly cloudy | 38 % |
| Fri, August 14 | 8–12 kn WNW | 15 kn | 66–74 °F | Mostly sunny | 12 % |
| Sat, August 15 | 7–9 kn NW | 12 kn | 65–74 °F | Mostly sunny | 8 % |
Source: NOAA National Weather Service, forecast office BOX. Public domain. Wind in knots, from the direction given. The forecast grid for this place carries no wave heights, so none are shown.
Boating, beach and fishing at Block Island
The same forecast as above, read for three things people do here. Each verdict names what decided it.
| Day | Boating | Beach | Fishing |
|---|---|---|---|
| Today | Goodwind 12 kn or less | Good83 °F and dry | Goodlight wind, major window in daylight |
| Mon, August 10 | Goodwind 10 kn or less | Good79 °F and dry | Goodlight wind, major window in daylight |
| Tue, August 11 | Goodwind 12 kn or less | Good79 °F and dry | Goodlight wind, major window in daylight |
| Wed, August 12 | Goodwind 9 kn or less | Good76 °F and dry | Goodlight wind, major window in daylight |
| Thu, August 13 | Goodwind 13 kn or less | Fair38% chance of rain | Goodlight wind, major window in daylight |
| Fri, August 14 | Goodwind 12 kn or less | Fair74 °F | Goodlight wind, major window in daylight |
| Sat, August 15 | Goodwind 9 kn or less | Fair74 °F | Goodlight wind, major window in daylight |
Boating turns to Poor at the National Weather Service small craft threshold — sustained wind of 22 kn, gusts of 26 kn, or seas of 5 ft — and to Fair at 15 kn or 3 ft. Beach weighs air temperature, chance of rain and wind.Fishing asks whether the day is fishable at all and whether a solunar major window falls in daylight; it is not a prediction of what will bite. None of this replaces the marine forecast before you go out.
Sun and moon
Today
Sunrise 5:49 am · Sunset 7:53 pm
Moon 13% lit, waning
Tomorrow
Sunrise 5:50 am · Sunset 7:51 pm
Moon 6% lit, waning
Solunar windows for Block Island
The moon pulls hardest when it is directly overhead or on the far side of the earth — the two major windows of about two hours. The shorter minor windows sit around moonrise and moonset. Anglers use them to pick a time on the water; they are computed from the moon's position, not measured.
Today — Sunday, August 9
- Minor1:09 am – 2:09 amMoonrise
- Major8:50 am – 10:50 amMoon overhead
- Minor5:27 pm – 6:27 pmMoonset
- Major9:22 pm – 11:22 pmMoon underfoot
Monday, August 10
- Minor2:21 am – 3:21 amMoonrise
- Major9:54 am – 11:54 amMoon overhead
- Minor6:16 pm – 7:16 pmMoonset
- Major10:25 pm – 12:25 am (next day)Moon underfoot
Times are local to Block Island (America/New_York).
Questions about Block Island tides
Answered from the same NOAA predictions as the table above. Where this page has no basis for an answer, there is no entry.
- What time is high tide in Block Island today?
- High water at 4:59 am (2.7 ft) and 5:34 pm (3.6 ft), local time in Block Island. Heights are feet above MLLW. Because the tide runs on the moon rather than the clock, each turn falls roughly 50 minutes later tomorrow — the seven-day table above carries the shift.
- What time is low tide in Block Island today?
- Low water at 10:44 am (0.1 ft), local time in Block Island. A height below zero is a minus tide: the water falls further than MLLW, the level the heights are counted from.
- How many tides does Block Island get in a day?
- Two high waters and two low waters on most days, a little over six hours apart. Over the seven days on this page that comes to 14 high waters and 13 low waters. Where a date shows only three turns, the fourth has slipped past midnight and is listed under the following day.
- What is the tidal range at Block Island?
- About 3.5 ft between today's lowest and highest water. Across the next seven days the water moves between -0.3 and 3.9 ft — a span of about 4.2 ft. The range is widest around new and full moon and narrowest at the quarters, so it changes from week to week.
- Which tide station do these Block Island tide times come from?
- NOAA station 8459338, Block Island (Old Harbor) — a reference station. Old Harbor on the east side of the island. A reference station has its own long-running record, which is the strongest basis NOAA publishes. The predictions here are NOAA's, unchanged.
- What time zone are the Block Island tide times in?
- Every time on this page is clock time in Block Island — the America/New_York zone, daylight saving already applied. Nothing has to be converted, and no time is shown in UTC except the retrieval stamp at the foot of the page.
- When are the solunar windows at Block Island today?
- The major windows run 8:50 am to 10:50 am and 9:22 pm to 11:22 pm, with shorter minor windows around moonrise and moonset. They are computed from the moon's position over Block Island, not measured — anglers use them to pick a time on the water. The moon is 13% lit and waning.
- How far ahead does this Block Island tide chart go?
- Seven days in the table, and every high and low water for August 2026 and September 2026 in the calendar below it. The page is rebuilt every morning, so the first day is always today.
Nearby tide charts
Where these times come from
- Source
- NOAA Center for Operational Oceanographic Products and Services — station 8459338, Block Island (reference station)
- Datum
- MLLW — heights in feet above mean lower low water
- Retrieved
- Aug 9, 2026, 6:37 PM UTC
- Licence
- Public domain (US federal government data). NOS requests that attribution be given whenever NOS material is reproduced and re-disseminated.
Old Harbor on the east side of the island.
Predictions are issued by NOAA. The official NOAA data are authoritative. Not for navigation. Check the official NOAA station page before you rely on these times on the water.