Grassy Key, North Side Tides Today
Near Marathon · Florida Bay · Monroe County, FL · NOAA 8723921
- High12:50AM1.5 ft
- Low8:02AM0.5 ft
- High1:43PM1.4 ft
- Low7:58PM0.9 ft
Local Eastern time. Heights in feet above average low water (MLLW). Shaded bands are today's best fishing windows.
Fishing Outlook
The low tide at 8:02 AM lands near sunrise, and tide strength is about average.
Best Windows Today
- 7:02 to 9:02 AMaround low tide
- 12:43 to 2:43 PMaround high tide
Solunar Times
- Minor3:36 to 4:36 AMmoonrise
- Major9:03 to 11:03 AMmoon overhead
- Minor3:24 to 4:24 PMmoonset
- Major9:25 to 11:25 PMmoon underfoot
Major periods are the two hours around the moon overhead or underfoot. Minor periods are the hour around moonrise and moonset.
Fishing Outlook
No tide change lands near sunrise or sunset, and the tides are among the strongest this week.
Best Windows Today
- 7:50 to 9:50 AMaround low tide
- 1:32 to 3:32 PMaround high tide
Solunar Times
- Minor4:32 to 5:32 AMmoonrise
- Major9:48 to 11:48 AMmoon overhead
- Minor3:58 to 4:58 PMmoonset
- Major10:10 PM to 12:10 AMmoon underfoot
Major periods are the two hours around the moon overhead or underfoot. Minor periods are the hour around moonrise and moonset.
Fishing here? See Florida fishing license info and size and bag limits from the Florida Fish and Wildlife Conservation Commission.
Weather and Wind
- This AfternoonHigh 83°Sunny 4% rainNE 5 mph
- TonightLow 77°Mostly clear 9% rainNE 5 mph
- SaturdayHigh 81°Sunny 9% rainN 5 mph
Boating Forecast
Bayside and Gulfside from Craig Key to West End of Seven Mile Bridge · issued Fri 10:20 AM
- This Afternoon
- North to northeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop.
- Tonight
- North to northeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop.
- Saturday
- North winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop.
From the National Weather Service. Arrows point the way the wind blows.
Next 7 Days
30 Day Tide Table| Day | Fishing | High Tides | Low Tides | Moon |
|---|---|---|---|---|
| SaturdayNov 7 | 1:23 AM 1.6 ft2:32 PM 1.3 ft | 8:50 AM 0.3 ft8:33 PM 0.9 ft | ||
| SundayNov 8 | 1:56 AM 1.7 ft3:15 PM 1.2 ft | 9:32 AM 0.2 ft9:07 PM 0.9 ft | ||
| MondayNov 9 | 2:28 AM 1.7 ft3:54 PM 1.2 ft | 10:12 AM 0.1 ft9:39 PM 0.9 ft | ||
| TuesdayNov 10 | 3:01 AM 1.7 ft4:31 PM 1.1 ft | 10:50 AM 0.1 ft10:11 PM 0.9 ft | ||
| WednesdayNov 11 | 3:35 AM 1.6 ft5:08 PM 1.0 ft | 11:29 AM 0.1 ft10:42 PM 0.9 ft | ||
| ThursdayNov 12 | 4:11 AM 1.6 ft5:46 PM 1.0 ft | 12:10 PM 0.2 ft11:12 PM 0.9 ft | ||
| FridayNov 13 | 4:49 AM 1.6 ft6:27 PM 0.9 ft | 12:54 PM 0.3 ft11:43 PM 1.0 ft |
About the Tides at Grassy Key, North Side
Grassy Key, North Side gets two high tides and two low tides most days, and they are not a matched pair. One high or one low each day is clearly bigger than the other. On a typical day the water rises and falls about 1.1 feet.
Over the next two weeks the biggest tides come on Tuesday, November 10, when the water moves about 1.6 feet. The lowest water is 0.1 ft on Tuesday, November 10 at 10:50 AM, and the highest is 1.7 ft on Monday, November 9 at 2:28 AM.
NOAA works out the times here from its reference station at Key West, adjusted for this location.
Official NOAA prediction for station 8723921, Grassy Key, north side, Florida Bay, timed from its reference station Key West (8724580). Updated Fri, 06 Nov 2026 17:46 GMT.