Port Jefferson Tides Today
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Port Jefferson runs a mean tidal range of about 6.3 ft. This month the highest water, 8.0 ft, comes on the morning of Nov 25, and the lowest, a -0.8 ft minus tide, on the evening of Nov 25.
| Low tide | 12:56 AM | 0.4 ft |
| High tide | 7:07 AM | 6.8 ft |
| Low tide | 1:27 PM | 0.5 ft |
| High tide | 7:33 PM | 6.5 ft |
Today on the water at Port Jefferson
Today at Port Jefferson: high tide at 7:07 AM (6.8 ft) and 7:33 PM (6.5 ft), low tide at 12:56 AM (0.4 ft) and 1:27 PM (0.5 ft). The National Weather Service forecast for this afternoon is sunny with S winds 10 mph, 68°F. Sunrise is at 6:25 AM and sunset at 4:46 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| This Afternoon | Sunny | S 10 mph | 68°F |
| Tonight | Partly Cloudy | S 10 mph | 62°F |
Forecast: National Weather Service point forecast for this location.
Where Port Jefferson is
Port Jefferson sits at 40.9500° N, 73.0767° W on Long Island Sound, at Port Jefferson, NY, in Suffolk County. The station here is a historical NOAA reference station: a gauge measured the tide at this spot from 1957 until 1992, and NOAA still publishes harmonic predictions from that record. There is no live reading here today. The closest gauge measuring live water level is Bridgeport (NOAA 8467150), 16.6 mi away, and high and low water here run on average about 7 min later than there. The nearest weather station is Islip, Long Island Mac Arthur Airport, an airport reporting wind, visibility and sky cover, but no water temperature, 10.9 mi away.
The tide at Port Jefferson
Port Jefferson 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 7.2 ft, and 6.6 ft between the average high and the average low, a large tide. On an average day the higher high tops the lower high by 0.3 ft and the lower low sits 0.2 ft below the other low. For the water around it: Sound tides are semidiurnal and grow from 2 to 3 ft at the eastern entrance to 7 ft or more at the western end.
About this station
- High tide reaches Port Jefferson about 3.9 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: 11.9 ft on Feb 6, 1978.
- Lowest on record: -3.8 ft on Jan 10, 1978.
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 Port Jefferson from the 1983-2001 National Tidal Datum Epoch; mean higher high water is 7.2 ft above it and mean sea level 3.5 ft. The land survey datum NAVD88, the zero on topographic maps and flood maps, is 3.7 ft above MLLW here, so a water level on this page converts to NAVD88 by subtracting that amount. These datums are controlled from NOAA's Montauk, NY gauge. Source: NOAA CO-OPS station 8514560, established 1957, gauge removed 1992. 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 Port Jefferson
- Port Jefferson Harbor entrance: 1.7 mi, tides about 5 min earlier
- Cedar Beach: 2.0 mi, tides at about the same time
- Patchogue: 14.1 mi, tides about 18 min earlier
- Great River, Connetquot River: 16.1 mi, tides about 13 min earlier
- Lloyd Harbor, Huntington Bay: 18.7 mi, tides at about the same time
TidalMapMonthly tide calendar
🌊 Biggest flood tides of the month at Port Jefferson this month: Nov 7, Nov 8, Nov 9, Nov 22, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27. These spring highs run the highest water of the month.
🔻 Lowest tides of the month at Port Jefferson this month: Nov 6, Nov 7, Nov 8, Nov 9, Nov 22, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27, Nov 28, Nov 29. These minus lows are when flats and bars dry out.
Best fishing times (solunar)
Major and minor solunar windows for Port Jefferson, 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 🌗 | 7:06–9:06 AM 7:31–9:31 PM | 12:32–2:32 AM 1:27–3:27 PM | 61 |
| Thu Nov 5 🌘 | 7:52–9:52 AM 8:17–10:17 PM | 1:42–3:42 AM 1:49–3:49 PM | 73 |
| Fri Nov 6 🌘 | 8:36–10:36 AM 9:01–11:01 PM | 2:51–4:51 AM 2:12–4:12 PM | 83 |
| Sat Nov 7 🌘 | 9:22–11:22 AM 9:47–11:47 PM | 3:59–5:59 AM 2:35–4:35 PM | 91 |
| Sun Nov 8 🌘 | 10:08–12:08 PM 10:33–12:33 AM | 5:06–7:06 AM 3:02–5:02 PM | 97 |
| Mon Nov 9 🌑 | 10:56–12:56 PM 11:21–1:21 AM | 6:12–8:12 AM 3:34–5:34 PM | 99 |
| Tue Nov 10 🌑 | 11:45–1:45 PM 12:10–2:10 AM | 7:15–9:15 AM 4:11–6:11 PM | 99 |
Predictions & observations: NOAA CO-OPS station 8514560. 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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