Today's tide
Today's tides
ft above MLLW- High3:01 AM1.7 ft
- Low10:50 AM0.1 ft
- High4:31 PM1.1 ft
- Low10:11 PM0.9 ft
Tomorrow's tide (predicted)
Tomorrow's tides
ft above MLLW- High3:35 AM1.6 ft
- Low11:29 AM0.1 ft
- High5:08 PM1.0 ft
- Low10:42 PM0.9 ft
| Tide | Time | Height |
|---|---|---|
| High | 3:01 AM | 1.7 ft |
| Low | 10:50 AM | 0.1 ft |
| High | 4:31 PM | 1.1 ft |
| Low | 10:11 PM | 0.9 ft |
Best windows today
- Fishing11:15 AM to 12:00 PM
Today's best window (6:00 to 8:00 AM) has passed. Dawn light with the outgoing tide around the 10:50 AM low. Second window 1:00 to 2:00 AM.
- Tidepools & shelling10:00 AM to 12:00 PM
The 0.1 ft low at 10:50 AM falls in full daylight.
- Surfing2:00 to 5:00 PM
Mid tide from 2:00 to 5:00 PM. No wind sensor at this station.
- Shallow boat launchAvoid 5:00 to 12:00 AM
Under 1.5 ft around low water. Launch before 5:00 AM.
Best windows tomorrow
- Fishing3:00 to 6:00 PM
Moving water near sunset, as the tide rises toward the 5:08 PM high. Second window 6:00 to 8:00 AM.
- Tidepools & shelling11:00 AM to 12:00 PM
The 0.1 ft low at 11:29 AM falls in full daylight.
- Surfing2:00 to 5:00 PM
Mid tide from 2:00 to 5:00 PM. No wind sensor at this station.
- Shallow boat launchAvoid 5:00 to 12:00 AM
Under 1.5 ft around low water. Launch before 5:00 AM.
Next 7 days
November calendar →| Day | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Range, ft |
|---|---|---|---|---|---|
| TodayTue 10 | H3:01a1.7 | L10:50a0.1 | H4:31p1.1 | L10:11p0.9 | 1.6 spring tide |
| WedNov 11 | H3:35a1.6 | L11:29a0.1 | H5:08p1.0 | L10:42p0.9 | 1.5 spring tide |
| ThuNov 12 | H4:11a1.6 | L12:10p0.2 | H5:46p1.0 | L11:12p0.9 | 1.4 spring tide |
| FriNov 13 | H4:49a1.5 | L12:54p0.3 | H6:27p0.9 | L11:43p1.0 | 1.3 |
| SatNov 14 | H5:30a1.5 | L1:42p0.4 | H7:14p0.9 | 1.1 | |
| SunNov 15 | L12:20a1.1 | H6:15a1.4 | L2:35p0.5 | H8:07p0.9 | 1.0 |
| MonNov 16 | L1:16a1.1 | H7:08a1.4 | L3:30p0.6 | H9:04p1.0 | 0.8 |
Spring tides Tuesday to Thursday. Lows drop to 0.1 ft, the best low-water 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 8723921.
Nearby stations
Currents
Long Key Viaduct
- Max ebb2:50 AM 1.5 kn
- Slack6:12 AM
- Max flood9:20 AM 1.1 kn
- Slack1:08 PM
- Max ebb3:42 PM 1.2 kn
- Slack6:41 PM
- Max flood9:15 PM 0.9 kn
Current predictions for Long Key Viaduct, 5 mi away. Currents near inlets can be strong. Not for navigation.
Station details
- Datum
- Mean lower low water
- Predictions
- NOAA subordinate, from Key West
- Live gauge
- None
- Coordinates
- 24.772° N, 80.940° W
- Time zone
- Eastern, UTC−5
- Station ID
- NOAA 8723921
About the tides at Grassy Key
Grassy Key has a mixed tide. The two daily highs, and especially the two lows, can differ a lot in height. The pattern follows the reference station at Key West. The mean range is small, about 0.9 ft, so wind and pressure can matter as much as the tide itself. That is smaller than most Florida stations on this site. From the average lower low to the average higher high, the difference is 1.3 ft. The next spring tides peak today, with a range of 1.6 ft. Neap tides follow on November 19, when the range shrinks to 0.5 ft. In the next 12 months the highest predicted tide here is 1.9 ft on October 28, and the lowest is −0.7 ft on January 21.
Grassy Key is a subordinate station. NOAA predicts its tides by adjusting Key West: highs come about 340 min and lows about 408 min later than there. NOAA measured the tide here from 1970 to 1982 to set up these predictions. The nearest other station is Toms Harbor Channel, 1 mi away, where high tide comes about 33 min earlier. For tidal currents, see Long Key Viaduct.
Predictions are based on Key West.
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.