Portland, ME tide chart
High and low waters at NOAA tide prediction station 8418150, Portland, in feet above mean lower low water and in local clock time. Tables below are grouped by calendar month, so each one stays correct for the whole month it names.
Predictions stored for Saturday, October 17 to Monday, November 30 (45 days, 174 high and low waters), retrieved from NOAA on 2026-10-17.
The week of Saturday, October 17
Water rising (flood)Water falling (ebb)Now, when your browser can draw it
Tide times at Portland, October 17–31, 2026
Stored predictions cover October 17 to 31 only, so this table is a part month. The full month is available from NOAA through the printable tool.
| Date | Tide | Time (local) | Height, ft above MLLW |
|---|---|---|---|
| Saturday, October 17 | High | 4:22 a.m. | 7.808 |
| Low | 10:09 a.m. | 2.178 | |
| High | 4:25 p.m. | 8.672 | |
| Low | 10:56 p.m. | 1.424 | |
| Sunday, October 18 | High | 5:17 a.m. | 7.637 |
| Low | 11:04 a.m. | 2.332 | |
| High | 5:22 p.m. | 8.502 | |
| Low | 11:52 p.m. | 1.553 | |
| Monday, October 19 | High | 6:13 a.m. | 7.637 |
| Low | 12:01 p.m. | 2.335 | |
| High | 6:20 p.m. | 8.466 | |
| Tuesday, October 20 | Low | 12:47 a.m. | 1.526 |
| High | 7:09 a.m. | 7.825 | |
| Low | 1:01 p.m. | 2.153 | |
| High | 7:17 p.m. | 8.565 | |
| Wednesday, October 21 | Low | 1:40 a.m. | 1.351 |
| High | 8:00 a.m. | 8.194 | |
| Low | 1:57 p.m. | 1.772 | |
| High | 8:12 p.m. | 8.783 | |
| Thursday, October 22 | Low | 2:28 a.m. | 1.071 |
| High | 8:46 a.m. | 8.701 | |
| Low | 2:49 p.m. | 1.228 | |
| High | 9:01 p.m. | 9.073 | |
| Friday, October 23 | Low | 3:11 a.m. | 0.743 |
| High | 9:27 a.m. | 9.282 | |
| Low | 3:35 p.m. | 0.598 | |
| High | 9:47 p.m. | 9.376 | |
| Saturday, October 24 | Low | 3:51 a.m. | 0.424 |
| High | 10:06 a.m. | 9.874 | |
| Low | 4:18 p.m. | -0.034 | |
| High | 10:30 p.m. | 9.64 | |
| Sunday, October 25 | Low | 4:31 a.m. | 0.156 |
| High | 10:45 a.m. | 10.415 | |
| Low | 5:02 p.m. | -0.588 | |
| High | 11:15 p.m. | 9.827 | |
| Monday, October 26 | Low | 5:13 a.m. | -0.029 |
| High | 11:25 a.m. | 10.845 | |
| Low | 5:46 p.m. | -0.997 | |
| Tuesday, October 27 | High | 12:00 a.m. | 9.909 |
| Low | 5:56 a.m. | -0.108 | |
| High | 12:08 p.m. | 11.117 | |
| Low | 6:32 p.m. | -1.21 | |
| Wednesday, October 28 | High | 12:47 a.m. | 9.867 |
| Low | 6:42 a.m. | -0.069 | |
| High | 12:55 p.m. | 11.198 | |
| Low | 7:21 p.m. | -1.205 | |
| Thursday, October 29 | High | 1:36 a.m. | 9.693 |
| Low | 7:31 a.m. | 0.093 | |
| High | 1:44 p.m. | 11.076 | |
| Low | 8:13 p.m. | -0.994 | |
| Friday, October 30 | High | 2:29 a.m. | 9.414 |
| Low | 8:23 a.m. | 0.364 | |
| High | 2:38 p.m. | 10.774 | |
| Low | 9:09 p.m. | -0.643 | |
| Saturday, October 31 | High | 3:27 a.m. | 9.103 |
| Low | 9:21 a.m. | 0.691 | |
| High | 3:39 p.m. | 10.369 | |
| Low | 10:11 p.m. | -0.262 |
Tide times at Portland, November 2026
| Date | Tide | Time (local) | Height, ft above MLLW |
|---|---|---|---|
| Sunday, November 1 | High | 3:32 a.m. | 8.875 |
| Low | 9:26 a.m. | 0.972 | |
| High | 3:46 p.m. | 9.975 | |
| Low | 10:17 p.m. | 0.048 | |
| Monday, November 2 | High | 4:40 a.m. | 8.82 |
| Low | 10:36 a.m. | 1.11 | |
| High | 4:56 p.m. | 9.673 | |
| Low | 11:23 p.m. | 0.245 | |
| Tuesday, November 3 | High | 5:46 a.m. | 8.954 |
| Low | 11:47 a.m. | 1.049 | |
| High | 6:05 p.m. | 9.495 | |
| Wednesday, November 4 | Low | 12:28 a.m. | 0.327 |
| High | 6:49 a.m. | 9.244 | |
| Low | 12:57 p.m. | 0.782 | |
| High | 7:12 p.m. | 9.438 | |
| Thursday, November 5 | Low | 1:27 a.m. | 0.332 |
| High | 7:45 a.m. | 9.606 | |
| Low | 1:58 p.m. | 0.393 | |
| High | 8:11 p.m. | 9.444 | |
| Friday, November 6 | Low | 2:20 a.m. | 0.338 |
| High | 8:35 a.m. | 9.932 | |
| Low | 2:52 p.m. | 0.022 | |
| High | 9:04 p.m. | 9.434 | |
| Saturday, November 7 | Low | 3:07 a.m. | 0.405 |
| High | 9:21 a.m. | 10.145 | |
| Low | 3:40 p.m. | -0.234 | |
| High | 9:52 p.m. | 9.366 | |
| Sunday, November 8 | Low | 3:50 a.m. | 0.546 |
| High | 10:02 a.m. | 10.221 | |
| Low | 4:24 p.m. | -0.34 | |
| High | 10:37 p.m. | 9.236 | |
| Monday, November 9 | Low | 4:31 a.m. | 0.742 |
| High | 10:42 a.m. | 10.175 | |
| Low | 5:06 p.m. | -0.301 | |
| High | 11:19 p.m. | 9.054 | |
| Tuesday, November 10 | Low | 5:09 a.m. | 0.967 |
| High | 11:20 a.m. | 10.035 | |
| Low | 5:45 p.m. | -0.143 | |
| Wednesday, November 11 | High | 12:00 a.m. | 8.83 |
| Low | 5:47 a.m. | 1.199 | |
| High | 11:58 a.m. | 9.832 | |
| Low | 6:24 p.m. | 0.098 | |
| Thursday, November 12 | High | 12:39 a.m. | 8.578 |
| Low | 6:25 a.m. | 1.431 | |
| High | 12:36 p.m. | 9.588 | |
| Low | 7:03 p.m. | 0.384 | |
| Friday, November 13 | High | 1:19 a.m. | 8.318 |
| Low | 7:05 a.m. | 1.658 | |
| High | 1:16 p.m. | 9.323 | |
| Low | 7:44 p.m. | 0.676 | |
| Saturday, November 14 | High | 2:02 a.m. | 8.079 |
| Low | 7:47 a.m. | 1.872 | |
| High | 1:59 p.m. | 9.053 | |
| Low | 8:28 p.m. | 0.934 | |
| Sunday, November 15 | High | 2:48 a.m. | 7.905 |
| Low | 8:34 a.m. | 2.047 | |
| High | 2:47 p.m. | 8.806 | |
| Low | 9:15 p.m. | 1.125 | |
| Monday, November 16 | High | 3:38 a.m. | 7.842 |
| Low | 9:25 a.m. | 2.14 | |
| High | 3:39 p.m. | 8.61 | |
| Low | 10:04 p.m. | 1.231 | |
| Tuesday, November 17 | High | 4:28 a.m. | 7.92 |
| Low | 10:19 a.m. | 2.106 | |
| High | 4:32 p.m. | 8.49 | |
| Low | 10:53 p.m. | 1.253 | |
| Wednesday, November 18 | High | 5:17 a.m. | 8.146 |
| Low | 11:14 a.m. | 1.912 | |
| High | 5:27 p.m. | 8.459 | |
| Low | 11:42 p.m. | 1.192 | |
| Thursday, November 19 | High | 6:06 a.m. | 8.519 |
| Low | 12:11 p.m. | 1.54 | |
| High | 6:23 p.m. | 8.538 | |
| Friday, November 20 | Low | 12:32 a.m. | 1.045 |
| High | 6:54 a.m. | 9.02 | |
| Low | 1:06 p.m. | 0.994 | |
| High | 7:17 p.m. | 8.733 | |
| Saturday, November 21 | Low | 1:21 a.m. | 0.817 |
| High | 7:40 a.m. | 9.607 | |
| Low | 1:58 p.m. | 0.337 | |
| High | 8:09 p.m. | 9.009 | |
| Sunday, November 22 | Low | 2:08 a.m. | 0.535 |
| High | 8:24 a.m. | 10.214 | |
| Low | 2:47 p.m. | -0.328 | |
| High | 8:59 p.m. | 9.3 | |
| Monday, November 23 | Low | 2:55 a.m. | 0.25 |
| High | 9:09 a.m. | 10.763 | |
| Low | 3:35 p.m. | -0.9 | |
| High | 9:48 p.m. | 9.544 | |
| Tuesday, November 24 | Low | 3:42 a.m. | 0.012 |
| High | 9:56 a.m. | 11.185 | |
| Low | 4:24 p.m. | -1.305 | |
| High | 10:38 p.m. | 9.702 | |
| Wednesday, November 25 | Low | 4:31 a.m. | -0.14 |
| High | 10:45 a.m. | 11.435 | |
| Low | 5:14 p.m. | -1.509 | |
| High | 11:29 p.m. | 9.753 | |
| Thursday, November 26 | Low | 5:22 a.m. | -0.181 |
| High | 11:37 a.m. | 11.49 | |
| Low | 6:06 p.m. | -1.506 | |
| Friday, November 27 | High | 12:22 a.m. | 9.697 |
| Low | 6:15 a.m. | -0.099 | |
| High | 12:30 p.m. | 11.338 | |
| Low | 7:00 p.m. | -1.316 | |
| Saturday, November 28 | High | 1:17 a.m. | 9.554 |
| Low | 7:10 a.m. | 0.103 | |
| High | 1:27 p.m. | 10.993 | |
| Low | 7:56 p.m. | -0.987 | |
| Sunday, November 29 | High | 2:15 a.m. | 9.381 |
| Low | 8:10 a.m. | 0.379 | |
| High | 2:27 p.m. | 10.513 | |
| Low | 8:56 p.m. | -0.597 | |
| Monday, November 30 | High | 3:18 a.m. | 9.262 |
| Low | 9:15 a.m. | 0.636 | |
| High | 3:33 p.m. | 9.995 | |
| Low | 9:57 p.m. | -0.208 |
Printed from TideCurve. Predictions: NOAA CO-OPS station 8418150, datum MLLW, stored range 2026-10-17 to 2026-11-30, retrieved 2026-10-17. Astronomical predictions only.
Pick any dates for Portland in the printable tool, which requests them from NOAA when you open it.
What the numbers at this station mean
Heights are feet above mean lower low water, the datum NOAA uses for tide predictions on US coasts. A predicted height of -1.509 ft does not mean -1.509 ft of water under a boat: it means the surface is predicted to be -1.509 ft above the chart datum, and the depth at any spot is whatever the chart says plus that number.
- Mean range across the stored period. The average height difference between one extreme and the next is 8.93 ft here, with the largest single swing 13 ft and the smallest 5.3 ft.
- Spacing. Successive high waters sit 12 h 25 min apart on average, which is why a tide that is convenient this morning is inconvenient within a few days.
- Type. This station returned 87 high waters and 87 low waters across 45 days. Where those counts are not close to two a day, the station's tide is not a simple twice-daily cycle and the curve above will look it.
Station provenance
| NOAA station | PORTLAND (8418150), Maine |
|---|---|
| Coordinates | 43.658054, -70.24416 |
| Prediction type | Reference station. NOAA computes predictions here from this station's own harmonic constants. |
| Datum | MLLW — mean lower low water |
| Units | Feet |
| Time zone | America/New_York. Requested with time_zone=lst_ldt, so NOAA returns local standard time corrected for daylight saving time while it is in effect. Times on this page are clock times at the station, and no second conversion is applied anywhere. |
| Stored coverage | 2026-10-17 to 2026-11-30 — 45 days, 174 predicted high and low waters, served at /data/tides/8418150.json |
| Retrieved | Station metadata 2026-10-16; predictions 2026-10-17 |
| Request | https://api.tidesandcurrents.noaa.gov/api/prod/datagetter?product=predictions&datum=MLLW&station=8418150&time_zone=lst_ldt&units=english&interval=hilo&format=json&begin_date=20261017&end_date=20261130 |
| Source | NOAA CO-OPS Data API, public domain. Station metadata from the CO-OPS Metadata API. |
What these predictions are not. They are astronomical: the tide the sun and moon would produce on their own. NOAA's own FAQ puts it plainly — "we can only predict the astronomical tides" and not "the effect that wind, rain, freshwater runoff" have on the water level (NOAA Tides & Currents FAQ). A storm, a strong onshore wind or a wet week can put the water well above the line, and a hard offshore wind can hold it below. Nothing on this page tells you whether a place is safe to walk, swim, anchor or cross, and times of slack water are a different quantity again — see high tide vs slack tide.
Nearby stations
Predictions change along a coast, inside a harbour and up an estuary. If your spot is closer to one of these, use that station instead.
- Pine Point, ME — station 8418445, about 9 mi away
- South Freeport, ME — station 8417801, about 13 mi away
- Fort Popham, Hunniwell Point, ME — station 8417177, about 24 mi away
- Wells, ME — station 8419317, about 28 mi away
- Bath, ME — station 8417227, about 28 mi away
Or see every station on the list and how these pages were built.