Grassy Key, north side, Florida Bay Tide Chart
Florida · NOAA Station 8723921 · 24.772°, -80.940°
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This Week’s Tides for Grassy Key, north side, Florida Bay
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 3:54 AM | 0.5 ft |
| High | 9:23 AM | 1.2 ft |
| Low | 5:15 PM | 0.3 ft |
| High | 10:22 PM | 0.7 ft |
| Low | 4:36 AM | 0.6 ft |
| High | 10:12 AM | 1.2 ft |
| Low | 6:26 PM | 0.2 ft |
| High | 11:59 PM | 0.6 ft |
| Low | 5:22 AM | 0.6 ft |
| High | 11:06 AM | 1.2 ft |
| Low | 7:34 PM | 0.2 ft |
| High | 1:36 AM | 0.6 ft |
| Low | 6:13 AM | 0.7 ft |
| High | 12:03 PM | 1.2 ft |
| Low | 8:35 PM | 0.1 ft |
| High | 2:42 AM | 0.6 ft |
| Low | 7:07 AM | 0.7 ft |
| High | 12:58 PM | 1.3 ft |
| Low | 9:27 PM | 0.0 ft |
| High | 3:25 AM | 0.6 ft |
| Low | 8:02 AM | 0.7 ft |
| High | 1:48 PM | 1.3 ft |
| Low | 10:10 PM | 0.0 ft |
| High | 3:57 AM | 0.7 ft |
| Low | 8:52 AM | 0.7 ft |
| High | 2:34 PM | 1.3 ft |
| Low | 10:46 PM | -0.1 ft |
Grassy Key, north side, Florida Bay Tide Table — Next 30 Days
Every high and low tide for the next month at Grassy Key, north side, Florida Bay, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Tue, Jul 21Today | 6:46 AM | 8:14 PM | Low3:54 AM0.5 ft | High9:23 AM1.2 ft | Low5:15 PM0.3 ft | High10:22 PM0.7 ft | 0.9 ft |
| Wed, Jul 22 | 6:47 AM | 8:13 PM | Low4:36 AM0.6 ft | High10:12 AM1.2 ft | Low6:26 PM0.2 ft | High11:59 PM0.6 ft | 1.0 ft |
| Thu, Jul 23 | 6:47 AM | 8:13 PM | Low5:22 AM0.6 ft | High11:06 AM1.2 ft | Low7:34 PM0.2 ft | — | 1.0 ft |
| Fri, Jul 24 | 6:48 AM | 8:12 PM | High1:36 AM0.6 ft | Low6:13 AM0.7 ft | High12:03 PM1.2 ft | Low8:35 PM0.1 ft | 1.1 ft |
| Sat, Jul 25 | 6:48 AM | 8:12 PM | High2:42 AM0.6 ft | Low7:07 AM0.7 ft | High12:58 PM1.3 ft | Low9:27 PM0.0 ft | 1.3 ft |
| Sun, Jul 26 | 6:49 AM | 8:11 PM | High3:25 AM0.6 ft | Low8:02 AM0.7 ft | High1:48 PM1.3 ft | Low10:10 PM0.0 ft | 1.3 ft |
| Mon, Jul 27 | 6:49 AM | 8:11 PM | High3:57 AM0.7 ft | Low8:52 AM0.7 ft | High2:34 PM1.3 ft | Low10:46 PM-0.1 ft | 1.4 ft |
| Tue, Jul 28 | 6:50 AM | 8:10 PM | High4:24 AM0.7 ft | Low9:37 AM0.6 ft | High3:17 PM1.4 ft | Low11:19 PM-0.1 ft | 1.5 ft |
| Wed, Jul 29 | 6:50 AM | 8:10 PM | High4:51 AM0.8 ft | Low10:20 AM0.6 ft | High3:59 PM1.4 ft | Low11:49 PM0.0 ft | 1.4 ft |
| Thu, Jul 30 | 6:51 AM | 8:09 PM | High5:19 AM0.9 ft | Low11:00 AM0.6 ft | High4:39 PM1.4 ft | — | 0.8 ft |
| Fri, Jul 31 | 6:51 AM | 8:09 PM | Low12:18 AM0.0 ft | High5:47 AM1.0 ft | Low11:42 AM0.5 ft | High5:20 PM1.4 ft | 1.4 ft |
| Sat, Aug 1 | 6:52 AM | 8:08 PM | Low12:47 AM0.1 ft | High6:16 AM1.0 ft | Low12:25 PM0.5 ft | High6:01 PM1.4 ft | 1.3 ft |
| Sun, Aug 2 | 6:52 AM | 8:08 PM | Low1:16 AM0.2 ft | High6:46 AM1.1 ft | Low1:13 PM0.4 ft | High6:44 PM1.3 ft | 1.1 ft |
| Mon, Aug 3 | 6:53 AM | 8:07 PM | Low1:46 AM0.3 ft | High7:17 AM1.2 ft | Low2:07 PM0.4 ft | High7:30 PM1.1 ft | 0.9 ft |
| Tue, Aug 4 | 6:53 AM | 8:06 PM | Low2:17 AM0.4 ft | High7:50 AM1.2 ft | Low3:08 PM0.3 ft | High8:24 PM1.0 ft | 0.9 ft |
| Wed, Aug 5 | 6:53 AM | 8:06 PM | Low2:51 AM0.5 ft | High8:28 AM1.3 ft | Low4:17 PM0.2 ft | High9:33 PM0.8 ft | 1.1 ft |
| Thu, Aug 6 | 6:54 AM | 8:05 PM | Low3:30 AM0.6 ft | High9:15 AM1.3 ft | Low5:32 PM0.1 ft | High11:07 PM0.7 ft | 1.2 ft |
| Fri, Aug 7 | 6:54 AM | 8:04 PM | Low4:18 AM0.7 ft | High10:16 AM1.4 ft | Low6:50 PM0.0 ft | — | 1.4 ft |
| Sat, Aug 8 | 6:55 AM | 8:04 PM | High12:49 AM0.6 ft | Low5:19 AM0.7 ft | High11:30 AM1.4 ft | Low8:03 PM-0.1 ft | 1.5 ft |
| Sun, Aug 9 | 6:55 AM | 8:03 PM | High2:05 AM0.7 ft | Low6:32 AM0.7 ft | High12:44 PM1.5 ft | Low9:07 PM-0.1 ft | 1.6 ft |
| Mon, Aug 10 | 6:56 AM | 8:02 PM | High2:58 AM0.7 ft | Low7:46 AM0.7 ft | High1:52 PM1.6 ft | Low10:00 PM-0.2 ft | 1.8 ft |
| Tue, Aug 11 | 6:56 AM | 8:01 PM | High3:40 AM0.8 ft | Low8:53 AM0.6 ft | High2:53 PM1.7 ft | Low10:45 PM-0.1 ft | 1.8 ft |
| Wed, Aug 12 | 6:57 AM | 8:01 PM | High4:17 AM0.9 ft | Low9:54 AM0.5 ft | High3:49 PM1.7 ft | Low11:25 PM0.0 ft | 1.7 ft |
| Thu, Aug 13 | 6:57 AM | 8:00 PM | High4:52 AM1.0 ft | Low10:51 AM0.4 ft | High4:40 PM1.7 ft | — | 1.3 ft |
| Fri, Aug 14 | 6:57 AM | 7:59 PM | Low12:02 AM0.1 ft | High5:26 AM1.2 ft | Low11:44 AM0.3 ft | High5:29 PM1.6 ft | 1.5 ft |
| Sat, Aug 15 | 6:58 AM | 7:58 PM | Low12:38 AM0.2 ft | High6:00 AM1.3 ft | Low12:37 PM0.3 ft | High6:15 PM1.4 ft | 1.2 ft |
| Sun, Aug 16 | 6:58 AM | 7:57 PM | Low1:12 AM0.4 ft | High6:34 AM1.3 ft | Low1:31 PM0.3 ft | High7:00 PM1.3 ft | 1.0 ft |
| Mon, Aug 17 | 6:59 AM | 7:57 PM | Low1:46 AM0.5 ft | High7:08 AM1.4 ft | Low2:28 PM0.3 ft | High7:45 PM1.1 ft | 1.1 ft |
| Tue, Aug 18 | 6:59 AM | 7:56 PM | Low2:21 AM0.6 ft | High7:44 AM1.4 ft | Low3:28 PM0.4 ft | High8:35 PM0.9 ft | 1.0 ft |
| Wed, Aug 19 | 7:00 AM | 7:55 PM | Low2:56 AM0.7 ft | High8:25 AM1.4 ft | Low4:35 PM0.4 ft | High9:38 PM0.8 ft | 1.0 ft |
About Grassy Key, north side, Florida Bay tides
Tide predictions for Grassy Key, north side, Florida Bay come from NOAA station 8723921 (Florida), computed from long-term harmonic analysis of observed water levels. Heights are shown in feet relative to MLLW (Mean Lower Low Water) — the same datum used on US nautical charts — so they line up directly with charted depths.
Grassy Key, north side, Florida Bay typically sees a mixed semidiurnal tide, with two highs and two lows of differing heights each day. Use the curve above to time a harbor entrance, a beach walk, fishing a moving tide, or clearing a shallow bar — and remember that wind and pressure can push the real water level above or below prediction. The daily tidal range in the 30-day table shows how much water moves each day: bigger ranges around the new and full moon mean stronger currents.
Frequently asked
What time is high tide in Grassy Key, north side, Florida Bay today?+
Today (Tuesday, July 21), high tide at Grassy Key, north side, Florida Bay is at 9:23 AM (1.2 ft), 10:22 PM (0.7 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Grassy Key, north side, Florida Bay today?+
Today, low tide at Grassy Key, north side, Florida Bay is at 3:54 AM (0.5 ft), 5:15 PM (0.3 ft).
What tidal datum do these Grassy Key, north side, Florida Bay tide heights use?+
All heights are given in feet relative to MLLW (Mean Lower Low Water), the standard NOAA chart datum for US tidal waters. A tide of 0.0 ft equals the chart datum; negative tides fall below it.
How accurate are these tide predictions?+
These are NOAA harmonic predictions — highly accurate for the astronomical tide. Real water levels can still differ with wind, barometric pressure, and storms, so always check current conditions before getting underway.
Never mistime a tide again.
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