Port Jefferson Tide Chart
Washington · NOAA Station 9445683 · 47.747°, -122.477°
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This Week’s Tides for Port Jefferson
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 6:24 AM | 1.1 ft |
| High | 2:04 PM | 7.9 ft |
| Low | 6:08 PM | 6.9 ft |
| High | 11:47 PM | 9.9 ft |
| Low | 7:17 AM | 0.6 ft |
| High | 3:38 PM | 8.9 ft |
| Low | 7:56 PM | 7.7 ft |
| High | 12:34 AM | 9.4 ft |
| Low | 8:07 AM | 0.1 ft |
| High | 4:38 PM | 9.7 ft |
| Low | 9:32 PM | 7.9 ft |
| High | 1:27 AM | 9.1 ft |
| Low | 8:53 AM | -0.3 ft |
| High | 5:21 PM | 10.2 ft |
| Low | 10:32 PM | 7.7 ft |
| High | 2:19 AM | 9.0 ft |
| Low | 9:36 AM | -0.7 ft |
| High | 5:56 PM | 10.5 ft |
| Low | 11:13 PM | 7.5 ft |
| High | 3:08 AM | 9.0 ft |
| Low | 10:16 AM | -1.0 ft |
| High | 6:23 PM | 10.6 ft |
| Low | 11:43 PM | 7.2 ft |
| High | 3:52 AM | 9.1 ft |
| Low | 10:53 AM | -1.2 ft |
| High | 6:46 PM | 10.6 ft |
Port Jefferson Tide Table — Next 30 Days
Every high and low tide for the next month at Port Jefferson, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Wed, Jul 22Today | 5:35 AM | 8:58 PM | Low6:24 AM1.1 ft | High2:04 PM7.9 ft | Low6:08 PM6.9 ft | High11:47 PM9.9 ft | 8.8 ft |
| Thu, Jul 23 | 5:36 AM | 8:56 PM | Low7:17 AM0.6 ft | High3:38 PM8.9 ft | Low7:56 PM7.7 ft | — | 8.3 ft |
| Fri, Jul 24 | 5:37 AM | 8:55 PM | High12:34 AM9.4 ft | Low8:07 AM0.1 ft | High4:38 PM9.7 ft | Low9:32 PM7.9 ft | 9.6 ft |
| Sat, Jul 25 | 5:38 AM | 8:54 PM | High1:27 AM9.1 ft | Low8:53 AM-0.3 ft | High5:21 PM10.2 ft | Low10:32 PM7.7 ft | 10.5 ft |
| Sun, Jul 26 | 5:39 AM | 8:53 PM | High2:19 AM9.0 ft | Low9:36 AM-0.7 ft | High5:56 PM10.5 ft | Low11:13 PM7.5 ft | 11.2 ft |
| Mon, Jul 27 | 5:40 AM | 8:52 PM | High3:08 AM9.0 ft | Low10:16 AM-1.0 ft | High6:23 PM10.6 ft | Low11:43 PM7.2 ft | 11.6 ft |
| Tue, Jul 28 | 5:42 AM | 8:50 PM | High3:52 AM9.1 ft | Low10:53 AM-1.2 ft | High6:46 PM10.6 ft | — | 11.8 ft |
| Wed, Jul 29 | 5:43 AM | 8:49 PM | Low12:07 AM6.9 ft | High4:34 AM9.2 ft | Low11:29 AM-1.3 ft | High7:06 PM10.7 ft | 12.0 ft |
| Thu, Jul 30 | 5:44 AM | 8:48 PM | Low12:32 AM6.5 ft | High5:15 AM9.2 ft | Low12:04 PM-1.3 ft | High7:26 PM10.8 ft | 12.1 ft |
| Fri, Jul 31 | 5:45 AM | 8:46 PM | Low1:01 AM5.9 ft | High5:57 AM9.1 ft | Low12:39 PM-0.9 ft | High7:47 PM11.0 ft | 11.9 ft |
| Sat, Aug 1 | 5:47 AM | 8:45 PM | Low1:34 AM5.1 ft | High6:43 AM9.0 ft | Low1:14 PM-0.2 ft | High8:10 PM11.1 ft | 11.3 ft |
| Sun, Aug 2 | 5:48 AM | 8:44 PM | Low2:11 AM4.2 ft | High7:33 AM8.7 ft | Low1:50 PM0.8 ft | High8:36 PM11.2 ft | 10.4 ft |
| Mon, Aug 3 | 5:49 AM | 8:42 PM | Low2:52 AM3.2 ft | High8:29 AM8.4 ft | Low2:27 PM2.2 ft | High9:03 PM11.1 ft | 8.9 ft |
| Tue, Aug 4 | 5:51 AM | 8:41 PM | Low3:37 AM2.1 ft | High9:33 AM8.2 ft | Low3:07 PM3.7 ft | High9:33 PM11.0 ft | 8.9 ft |
| Wed, Aug 5 | 5:52 AM | 8:39 PM | Low4:27 AM1.1 ft | High10:49 AM8.0 ft | Low3:53 PM5.4 ft | High10:07 PM10.7 ft | 9.6 ft |
| Thu, Aug 6 | 5:53 AM | 8:38 PM | Low5:21 AM0.3 ft | High12:26 PM8.1 ft | Low4:53 PM6.9 ft | High10:49 PM10.5 ft | 10.2 ft |
| Fri, Aug 7 | 5:54 AM | 8:36 PM | Low6:21 AM-0.5 ft | High2:24 PM8.7 ft | Low6:22 PM8.0 ft | High11:43 PM10.2 ft | 10.7 ft |
| Sat, Aug 8 | 5:56 AM | 8:34 PM | Low7:24 AM-1.2 ft | High3:49 PM9.6 ft | Low8:05 PM8.3 ft | — | 10.8 ft |
| Sun, Aug 9 | 5:57 AM | 8:33 PM | High12:49 AM10.1 ft | Low8:25 AM-1.9 ft | High4:41 PM10.3 ft | Low9:27 PM8.0 ft | 12.2 ft |
| Mon, Aug 10 | 5:58 AM | 8:31 PM | High1:59 AM10.1 ft | Low9:22 AM-2.4 ft | High5:21 PM10.8 ft | Low10:25 PM7.3 ft | 13.2 ft |
| Tue, Aug 11 | 6:00 AM | 8:30 PM | High3:05 AM10.2 ft | Low10:15 AM-2.6 ft | High5:55 PM11.1 ft | Low11:12 PM6.4 ft | 13.7 ft |
| Wed, Aug 12 | 6:01 AM | 8:28 PM | High4:06 AM10.2 ft | Low11:03 AM-2.4 ft | High6:26 PM11.3 ft | Low11:57 PM5.5 ft | 13.7 ft |
| Thu, Aug 13 | 6:02 AM | 8:26 PM | High5:03 AM10.1 ft | Low11:48 AM-1.9 ft | High6:56 PM11.4 ft | — | 13.3 ft |
| Fri, Aug 14 | 6:04 AM | 8:24 PM | Low12:40 AM4.4 ft | High6:00 AM9.9 ft | Low12:31 PM-0.9 ft | High7:24 PM11.4 ft | 12.3 ft |
| Sat, Aug 15 | 6:05 AM | 8:23 PM | Low1:23 AM3.5 ft | High6:58 AM9.5 ft | Low1:13 PM0.4 ft | High7:53 PM11.3 ft | 10.9 ft |
| Sun, Aug 16 | 6:06 AM | 8:21 PM | Low2:07 AM2.6 ft | High7:57 AM9.1 ft | Low1:55 PM2.0 ft | High8:22 PM11.0 ft | 9.0 ft |
| Mon, Aug 17 | 6:08 AM | 8:19 PM | Low2:51 AM1.8 ft | High8:59 AM8.7 ft | Low2:38 PM3.6 ft | High8:53 PM10.7 ft | 8.9 ft |
| Tue, Aug 18 | 6:09 AM | 8:17 PM | Low3:36 AM1.3 ft | High10:10 AM8.3 ft | Low3:26 PM5.2 ft | High9:26 PM10.1 ft | 8.8 ft |
| Wed, Aug 19 | 6:11 AM | 8:16 PM | Low4:24 AM1.0 ft | High11:38 AM8.3 ft | Low4:26 PM6.6 ft | High10:04 PM9.5 ft | 8.5 ft |
| Thu, Aug 20 | 6:12 AM | 8:14 PM | Low5:17 AM0.9 ft | High1:34 PM8.5 ft | Low6:02 PM7.6 ft | High10:52 PM8.9 ft | 8.0 ft |
About Port Jefferson tides
Tide predictions for Port Jefferson come from NOAA station 9445683 (Washington), computed from long-term harmonic analysis of observed water levels. Heights are shown in feet relative to MLLW (Mean Lower Low Water) — the same datum used on US nautical charts — so they line up directly with charted depths.
Port Jefferson typically sees a mixed semidiurnal tide, with two highs and two lows of differing heights each day. Use the curve above to time a harbor entrance, a beach walk, fishing a moving tide, or clearing a shallow bar — and remember that wind and pressure can push the real water level above or below prediction. The daily tidal range in the 30-day table shows how much water moves each day: bigger ranges around the new and full moon mean stronger currents.
Frequently asked
What time is high tide in Port Jefferson today?+
Today (Wednesday, July 22), high tide at Port Jefferson is at 2:04 PM (7.9 ft), 11:47 PM (9.9 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Port Jefferson today?+
Today, low tide at Port Jefferson is at 6:24 AM (1.1 ft), 6:08 PM (6.9 ft).
What tidal datum do these Port Jefferson tide heights use?+
All heights are given in feet relative to MLLW (Mean Lower Low Water), the standard NOAA chart datum for US tidal waters. A tide of 0.0 ft equals the chart datum; negative tides fall below it.
How accurate are these tide predictions?+
These are NOAA harmonic predictions — highly accurate for the astronomical tide. Real water levels can still differ with wind, barometric pressure, and storms, so always check current conditions before getting underway.
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