Roche Harbor, San Juan Island Tides Today
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Roche Harbor, San Juan Island runs a mean tidal range of about 4.9 ft. This month the highest water, 8.8 ft, comes on the morning of Nov 27, and the lowest, a -3.5 ft minus tide, on the evening of Nov 25.
| Low tide | 5:01 AM | 0.9 ft |
| High tide | 12:52 PM | 8.0 ft |
| Low tide | 7:47 PM | 4.1 ft |
Today on the water at Roche Harbor, San Juan Island
Today at Roche Harbor, San Juan Island: high tide at 12:52 PM (8.0 ft), low tide at 5:01 AM (0.9 ft) and 7:47 PM (4.1 ft). The National Weather Service forecast for Tuesday is partly sunny with N winds 3 mph, 52°F. Sunrise is at 7:00 AM and sunset at 4:51 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| Overnight | Slight Chance Rain Showers | N 1 mph | 42°F |
| Tuesday | Partly Sunny | N 3 mph | 52°F |
Forecast: National Weather Service point forecast for this location.
Where Roche Harbor, San Juan Island is
Roche Harbor, San Juan Island sits at 48.6100° N, 123.1550° W on Puget Sound and the Salish Sea, at Roche Harbor, WA. 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 Friday Harbor, San Juan Island (NOAA 9449880), 7.9 mi away, and high and low water here run on average about 4 min earlier than there. The nearest weather station is Friday Harbor, WA, a shore station reporting wind and, at most sites, water temperature, 7.9 mi away.
The tide at Roche Harbor, San Juan Island
Roche Harbor, San Juan Island has a mixed tide: two highs and two lows a day, but of unequal size, so one low each day drains a little lower than the other. This month's predictions average 1.8 high tides a day here. For the water around it: Puget Sound tides are mixed semidiurnal with a strong daily inequality: two highs and two lows a day, ranges of 8 to 14 ft, and lows that differ by several feet.
About this station
- NOAA predicts tides here from Port Townsend, station 9444900. High tide comes about 33 min later and low tide about 47 min later than there.
- High tide heights run about 0.90 times the reference.
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 Port Townsend and are referenced to MLLW there. Source: NOAA CO-OPS station 9449834. 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 Roche Harbor, San Juan Island
- Hanbury Point, Mosquito Pass, San Juan I.: 2.1 mi, tides about 21 min earlier
- Friday Harbor, San Juan Island: 7.9 mi, tides about 4 min later
- Kanaka Bay, San Juan Island: 9.2 mi, tides about 47 min earlier
- Orcas, Orcas Island: 9.4 mi, tides about 4 min later
- Shaw Island, Ferry Terminal, Harney Channel: 10.5 mi, tides about 4 min later
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Roche Harbor, San Juan Island this month: Nov 25, Nov 26, Nov 27, Nov 28, Nov 29, Nov 30. 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 Roche Harbor, San Juan Island this month: Nov 1, Nov 2, Nov 7, Nov 8, Nov 9, Nov 10, Nov 11, Nov 13, Nov 14, Nov 15, Nov 22, Nov 23 …. 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 Roche Harbor, San Juan Island, 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 🌗 | 6:45–8:45 AM 7:10–9:10 PM | 11:36–1:36 AM 1:36–3:36 PM | 49 |
| Wed Nov 4 🌗 | 7:33–9:33 AM 7:58–9:58 PM | 12:56–2:56 AM 1:52–3:52 PM | 62 |
| Thu Nov 5 🌘 | 8:18–10:18 AM 8:43–10:43 PM | 2:14–4:14 AM 2:08–4:08 PM | 74 |
| Fri Nov 6 🌘 | 9:03–11:03 AM 9:28–11:28 PM | 3:30–5:30 AM 2:23–4:23 PM | 84 |
| Sat Nov 7 🌘 | 9:48–11:48 AM 10:13–12:13 AM | 4:45–6:45 AM 2:40–4:40 PM | 92 |
| Sun Nov 8 🌘 | 10:35–12:35 PM 11:00–1:00 AM | 5:59–7:59 AM 3:01–5:01 PM | 97 |
| Mon Nov 9 🌑 | 11:23–1:23 PM 11:48–1:48 AM | 7:12–9:12 AM 3:27–5:27 PM | 99 |
Predictions & observations: NOAA CO-OPS station 9449834. 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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