Port Jefferson Harbor entrance Tides Today
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Port Jefferson Harbor entrance runs a mean tidal range of about 6.4 ft. This month the highest water, 8.1 ft, comes on the morning of Nov 25, and the lowest, a -0.7 ft minus tide, on the evening of Nov 25.
| High tide | 6:00 AM | 6.6 ft |
| Low tide | 12:18 PM | 0.7 ft |
| High tide | 6:26 PM | 6.6 ft |
Today on the water at Port Jefferson Harbor entrance
Today at Port Jefferson Harbor entrance: high tide at 6:00 AM (6.6 ft) and 6:26 PM (6.6 ft), low tide at 12:18 PM (0.7 ft). The National Weather Service forecast for Tuesday is sunny with SW winds 7 to 12 mph, 68°F. Sunrise is at 6:24 AM and sunset at 4:47 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| Overnight | Clear | SW 7 mph | 51°F |
| Tuesday | Sunny | SW 7 to 12 mph | 68°F |
Forecast: National Weather Service point forecast for this location.
Where Port Jefferson Harbor entrance is
Port Jefferson Harbor entrance sits at 40.9717° N, 73.0917° W on Long Island Sound, at Old Field, NY. The station here is a subordinate tide prediction point. NOAA has no gauge in the water at this spot; its times and heights are published as offsets from a reference gauge, named below. The closest gauge measuring live water level is Bridgeport (NOAA 8467150), 14.9 mi away, and the tide here runs on nearly the same clock. The nearest weather station is Islip, Long Island Mac Arthur Airport, an airport reporting wind, visibility and sky cover, but no water temperature, 12.3 mi away.
The tide at Port Jefferson Harbor entrance
Port Jefferson Harbor entrance 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. 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
- NOAA predicts tides here from Bridgeport, station 8467150. High tide comes about 2 min later and low tide about 1 min later than there.
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 publishes no datums for this point. Its predictions are offsets from Bridgeport and are referenced to MLLW there. Source: NOAA CO-OPS station 8514594. The tide times and heights are published as time and height offsets from its reference gauge; TidalMap republishes them daily and does not alter them.
Tide stations near Port Jefferson Harbor entrance
- Port Jefferson: 1.7 mi, tides about 5 min later
- Cedar Beach: 2.6 mi, tides about 6 min later
- Mount Sinai Harbor: 2.8 mi, tides about 10 min later
- Patchogue: 15.8 mi, tides about 13 min earlier
- Great River, Connetquot River: 17.4 mi, tides about 8 min earlier
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Port Jefferson Harbor entrance this month: Nov 7, Nov 8, Nov 9, Nov 22, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27. 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 Port Jefferson Harbor entrance this month: Nov 7, Nov 8, Nov 9, 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 Port Jefferson Harbor entrance, 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 🌗 | 6:18–8:18 AM 6:43–8:43 PM | 11:19–1:19 AM 1:03–3:03 PM | 47 |
| Wed Nov 4 🌗 | 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 🌘 | 8:37–10:37 AM 9:02–11:02 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 |
Predictions & observations: NOAA CO-OPS station 8514594. 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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