Today's tide
Today's tides
ft above MLLW- Low12:55 AM1.7 ft
- High7:15 AM8.2 ft
- Low1:11 PM2.3 ft
- High7:25 PM8.9 ft
Tomorrow's tide (predicted)
Tomorrow's tides
ft above MLLW- Low1:46 AM1.5 ft
- High8:06 AM8.5 ft
- Low2:05 PM1.9 ft
- High8:19 PM9.1 ft
| Tide | Time | Height |
|---|---|---|
| Low | 12:55 AM | 1.7 ft |
| High | 7:15 AM | 8.2 ft |
| Low | 1:11 PM | 2.3 ft |
| High | 7:25 PM | 8.9 ft |
Best windows today
- Fishing5:00 to 7:00 PM
Moving water near sunset, as the tide rises toward the 7:25 PM high. Second window 6:00 to 7:00 AM.
- Tidepools & shellingNext: Wed 1:00 to 3:00 PMEarlier today: 12:00 to 3:00 PM
Today's best window (12:00 to 3:00 PM) has passed.
- SurfingNext: Wed 4:00 to 6:00 PMEarlier today: 3:00 to 5:00 PM
Today's best window (3:00 to 5:00 PM) has passed.
- Shallow boat launchEnough water all day
Lowest is 1.7 ft at 12:55 AM.
Best windows tomorrow
- Fishing6:00 to 8:00 AM
Dawn light with the incoming tide around the 8:06 AM high. Second window 6:00 to 7:00 PM.
- Tidepools & shelling1:00 to 3:00 PM
The 1.9 ft low at 2:05 PM falls in full daylight. The tide returns fast here, so start heading back by 3:05 PM.
- Surfing4:00 to 6:00 PM
Mid tide from 4:00 to 6:00 PM. No wind sensor at this station.
- Shallow boat launchEnough water all day
Lowest is 1.5 ft at 1:46 AM.
Next 7 days
October calendar →| Day | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Range, ft |
|---|---|---|---|---|---|
| TodayTue 20 | L12:55a1.7 | H7:15a8.2 | L1:11p2.3 | H7:25p8.9 | 7.3 |
| WedOct 21 | L1:46a1.5 | H8:06a8.5 | L2:05p1.9 | H8:19p9.1 | 7.6 |
| ThuOct 22 | L2:35a1.2 | H8:53a9.0 | L2:57p1.4 | H9:09p9.4 | 8.2 |
| FriOct 23 | L3:21a0.9 | H9:36a9.6 | L3:45p0.8 | H9:56p9.7 | 9.0 |
| SatOct 24 | L4:04a0.6 | H10:16a10.2 | L4:31p0.1 | H10:40p10.0 | 10.1 |
| SunOct 25 | L4:47a0.3 | H10:56a10.8 | L5:16p−0.4 | H11:25p10.2 | 11.2 |
| MonOct 26 | L5:29a0.1 | H11:37a11.2 | L6:02p−0.9 | 12.1 spring tide |
Spring tides Monday. Lows drop to −0.9 ft, the best shelling days this week. Spring and neap tides
Tide predictions and observations: NOAA National Ocean Service, Center for Operational Oceanographic Products and Services (CO-OPS), station 8443970.
Nearby stations
Currents
South Boston, Pier 4, 0.2 n.mi. Nne of
- Slack1:43 AM
- Max flood5:36 AM 0.2 kn
- Slack7:18 AM
- Max ebb11:18 AM 0.3 kn
- Slack1:55 PM
- Max flood4:48 PM 0.1 kn
- Slack7:23 PM
Current predictions for South Boston, Pier 4, 0.2 n.mi. Nne of, 1 mi away. Currents near inlets can be strong. Not for navigation.
Station details
- Datum
- Mean lower low water
- Predictions
- NOAA, from this station's own tide records
- Live gauge
- Every 6 minutes
- Coordinates
- 42.354° N, 71.050° W
- Time zone
- Eastern, UTC−4
- Station ID
- NOAA 8443970
About the tides at Boston
Expect two roughly equal high tides a day at Boston Harbor, each arriving about 50 minutes later than the day before. With a mean range of about 9.5 ft, the shoreline here changes a lot between high and low water. That is larger than most Massachusetts stations on this site. From the average lower low to the average higher high, the difference is 10.3 ft. Looking a year ahead, predictions peak at 11.8 ft on November 26 and bottom out at −1.8 ft on January 23.
A live NOAA gauge measures the water here, and predictions are calculated from this station's own records. It also reports air pressure. It was established in 1921. The nearest other station is Charlestown, 1 mi away. For tidal currents, see South Boston, Pier 4, 0.2 n.mi. Nne of.
Tide predictions and water levels from NOAA CO-OPS. For planning only, not for navigation. Real water levels can differ because of wind, air pressure and river flow. Always check conditions on site.