Port Jefferson Harbor entrance, Long Island Sound Sea Conditions table showing wave height, swell direction and period.
High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at 06:39 AM and sunset is at 07:14 PM.
Days 1–3 Weather SummaryModerate rain (total 19mm), heaviest on Mon night. Cool air temperatures (max 14°C on Mon morning, min 2°C on Tue night). Mainly fresh winds. | Days 4–6 Weather SummaryLight rain (total 4mm), mostly falling on Wed night. Icy conditions (max 22°C on Thu night, min 0°C on Wed morning). Winds decreasing (fresh winds from the SSW on Thu morning, light winds from the WNW by Fri afternoon). | Days 7–9 Weather SummaryLight rain (total 7mm), mostly falling on Sun afternoon. Freeze-thaw conditions (max 13°C on Sat afternoon, min 0°C on Mon morning). Mainly strong winds. | Days 10–12 Weather SummarySome drizzle, heaviest during Wed night. Freeze-thaw conditions (max 9°C on Wed night, min 0°C on Tue morning). Winds increasing (calm on Tue afternoon, strong winds from the SW by Wed night). | |||||||||||||||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
Wave Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
High Tide | 12:38PM7.32ft | 00:56AM7.97ft | 1:28PM7.09ft | 1:45AM7.84ft | 2:20PM6.76ft | 2:38AM7.55ft | 3:16PM6.4ft | 3:36AM7.15ft | 4:18PM6.07ft | 4:40AM6.76ft | 5:25PM5.87ft | 5:49AM6.5ft | 6:35PM5.87ft | 7:01AM6.4ft | 7:43PM6.07ft | 8:09AM6.43ft | 8:42PM6.33ft | 9:07AM6.53ft | 9:33PM6.59ft | 9:58AM6.59ft | 10:17PM6.82ft | 10:41AM6.63ft | 10:55PM6.96ft | |||||||||||||
Low Tide | 6:30AM-1.35ft | 6:45PM-0.82ft | 7:19AM-1.35ft | 7:33PM-0.62ft | 8:11AM-1.08ft | 8:25PM-0.26ft | 9:07AM-0.69ft | 9:21PM0.2ft | 10:07AM-0.2ft | 10:24PM0.66ft | 11:13AM0.26ft | 11:34PM0.95ft | 12:21PM0.56ft | 00:46AM1.05ft | 1:29PM0.69ft | 1:55AM0.92ft | 2:30PM0.66ft | 2:56AM0.66ft | 3:22PM0.56ft | 3:48AM0.39ft | 4:08PM0.43ft | 4:33AM0.13ft | 4:48PM0.36ft | |||||||||||||
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 | |  |  | |  |  | |  | | |  | | | | | | | | | |  | |  | | | | | | | | | | | |  | |
cloudy | cloudy | cloudy | some clouds | some clouds | heavy rain | clear | clear | some clouds | clear | cloudy | light rain | some clouds | some clouds | some clouds | cloudy | cloudy | some clouds | some clouds | some clouds | some clouds | light rain | light rain | rain shwrs | clear | some clouds | some clouds | cloudy | cloudy | some clouds | clear | clear | rain shwrs | clear | some clouds | clear | |
mph | ||||||||||||||||||||||||||||||||||||
— | — | — | — | — | 0.7 | — | — | — | — | — | 0.2 | — | — | — | — | — | — | — | — | — | 0.04 | 0.1 | 0.1 | — | — | — | — | — | — | — | — | 0.04 | — | — | — | |
max°F | 39 | 43 | 52 | 57 | 57 | 55 | 41 | 50 | 46 | 34 | 39 | 50 | 54 | 66 | 72 | 66 | 61 | 59 | 43 | 55 | 52 | 45 | 43 | 43 | 36 | 41 | 39 | 32 | 37 | 39 | 34 | 45 | 48 | 43 | 46 | 43 |
Moonrise | 7:05 | — | — | 7:35 | — | — | 8:10 | — | — | 8:54 | — | — | 9:47 | — | — | 10:50 | — | — | 11:58 | — | — | 1:08 | — | — | 2:16 | — | — | — | 3:21 | — | — | 4:24 | — | — | 5:26 | — |
Moonset | — | — | 9:11 | — | — | 10:33 | — | — | 11:54 | — | — | — | 1:08 | — | — | 2:12 | — | — | 3:03 | — | — | 3:43 | — | — | 4:14 | — | — | 4:39 | — | — | 5:01 | — | — | 5:20 | — | — |
 | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — |
 | — | 7:14 | — | — | 7:15 | — | — | 7:15 | — | — | 7:16 | — | — | 7:17 | — | — | 7:19 | — | — | 7:21 | — | — | 7:22 | — | — | 7:22 | — | — | 7:23 | — | — | 7:24 | — | — | 7:25 | — |
Today's sea temperature in Port Jefferson Harbor entrance, Long Island Sound is 42 °F (Statistics for 30 Mar 1981-2005 – mean: 41 max: 44 min: 38°F) | ||||||||||||||||||||||||||||||||||||
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