NOAA CO-OPS 8418150
Portland Harbor tide chart
Tide predictions are for NOAA CO-OPS station Portland (8418150), datum MLLW. Times are the station's local time.
Today
Tue, Oct 20
This week
High and low tides
| Day | Turn | Time | Height |
|---|---|---|---|
| Tue, Oct 20 | Low | 12:47 AM | 1.53 ft |
| High | 7:09 AM | 7.83 ft | |
| Low | 1:01 PM | 2.15 ft | |
| High | 7:17 PM | 8.57 ft | |
| Wed, Oct 21 | Low | 1:40 AM | 1.35 ft |
| High | 8 AM | 8.19 ft | |
| Low | 1:57 PM | 1.77 ft | |
| High | 8:12 PM | 8.78 ft | |
| Thu, Oct 22 | Low | 2:28 AM | 1.07 ft |
| High | 8:46 AM | 8.70 ft | |
| Low | 2:49 PM | 1.23 ft | |
| High | 9:01 PM | 9.07 ft | |
| Fri, Oct 23 | Low | 3:11 AM | 0.74 ft |
| High | 9:27 AM | 9.28 ft | |
| Low | 3:35 PM | 0.60 ft | |
| High | 9:47 PM | 9.38 ft | |
| Sat, Oct 24 | Low | 3:51 AM | 0.42 ft |
| High | 10:06 AM | 9.87 ft | |
| Low | 4:18 PM | -0.03 ft | |
| High | 10:30 PM | 9.64 ft | |
| Sun, Oct 25 | Low | 4:31 AM | 0.16 ft |
| High | 10:45 AM | 10.42 ft | |
| Low | 5:02 PM | -0.59 ft | |
| High | 11:15 PM | 9.83 ft | |
| Mon, Oct 26 | Low | 5:13 AM | -0.03 ft |
| High | 11:25 AM | 10.85 ft | |
| Low | 5:46 PM | -1.00 ft |
Source and freshness
Retrieved from NOAA CO-OPS. Predictions stay cached for up to 6 hours, the same window harbor pages use. The page refreshes about every 15 minutes. Retrieved Oct 20, 7:46 AM EDT.
Use the tide with the forecast
The same station is the tide reference for Boothbay Harbor, Androscoggin River, Aspasia Marina, Atkins Bay, Back Cove, Beal Cove, Bowdoinham Marina and D's Docks, Breakwater Marina.
Tide chart questions
Where do the Portland Harbor tide times come from?
High and low times come from NOAA CO-OPS station Portland (8418150). Heights are in feet relative to mean lower low water (MLLW), in the station's local time. This page requests the same predictions product as the Portland Harbor harbor briefing.
How current is this tide chart?
These are astronomical predictions. The page shows when Boat or Nope retrieved them from CO-OPS. The response is cached for up to 6 hours, the same window the harbor pages use, and the page itself refreshes about every 15 minutes.
Does the Portland Harbor tide chart include storm surge or observed water level?
The chart is the predicted tide. When CO-OPS reports a recent measured water level at this station, the Portland Harbor Go/No-Go page compares it with the prediction. This tide page does not add a separate water-level request.
Why is there one tide chart for this station?
Harbors that share station 8418150 use one canonical chart so the same curve is not published as dozens of near-duplicate URLs. Boothbay Harbor, Androscoggin River, Aspasia Marina, Atkins Bay link here.