Johns Folly Bay, St. John Island Tide Chart
Puerto Rico · NOAA Station 9751274 · 18.317°, -64.702°
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This Week’s Tides for Johns Folly Bay, St. John Island
High and low tide times and heights (ft, MLLW) for the week ahead.
| High | 12:12 AM | 0.6 ft |
| Low | 8:10 AM | 0.1 ft |
| High | 4:35 PM | 0.7 ft |
| Low | 8:34 AM | 0.0 ft |
| High | 5:29 PM | 0.8 ft |
| Low | 9:05 AM | -0.1 ft |
| High | 6:15 PM | 0.8 ft |
| Low | 9:41 AM | -0.1 ft |
| High | 6:57 PM | 0.9 ft |
| Low | 10:23 AM | -0.1 ft |
| High | 7:38 PM | 0.9 ft |
| Low | 11:08 AM | -0.2 ft |
| High | 8:16 PM | 0.9 ft |
| Low | 11:54 AM | -0.1 ft |
| High | 8:51 PM | 1.0 ft |
Johns Folly Bay, St. John Island Tide Table — Next 30 Days
Every high and low tide for the next month at Johns Folly Bay, St. John Island, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Tue, Jul 21Today | 5:53 AM | 6:57 PM | High12:12 AM0.6 ft | Low8:10 AM0.1 ft | High4:35 PM0.7 ft | — | 0.6 ft |
| Wed, Jul 22 | 5:53 AM | 6:57 PM | Low8:34 AM0.0 ft | High5:29 PM0.8 ft | — | — | 0.8 ft |
| Thu, Jul 23 | 5:54 AM | 6:57 PM | Low9:05 AM-0.1 ft | High6:15 PM0.8 ft | — | — | 0.9 ft |
| Fri, Jul 24 | 5:54 AM | 6:56 PM | Low9:41 AM-0.1 ft | High6:57 PM0.9 ft | — | — | 1.0 ft |
| Sat, Jul 25 | 5:54 AM | 6:56 PM | Low10:23 AM-0.1 ft | High7:38 PM0.9 ft | — | — | 1.0 ft |
| Sun, Jul 26 | 5:55 AM | 6:56 PM | Low11:08 AM-0.2 ft | High8:16 PM0.9 ft | — | — | 1.1 ft |
| Mon, Jul 27 | 5:55 AM | 6:55 PM | Low11:54 AM-0.1 ft | High8:51 PM1.0 ft | — | — | 1.1 ft |
| Tue, Jul 28 | 5:55 AM | 6:55 PM | Low12:39 PM-0.1 ft | High9:24 PM1.0 ft | — | — | 1.1 ft |
| Wed, Jul 29 | 5:56 AM | 6:55 PM | Low1:23 PM0.0 ft | High9:54 PM1.0 ft | — | — | 1.0 ft |
| Thu, Jul 30 | 5:56 AM | 6:54 PM | Low2:05 PM0.1 ft | High10:23 PM1.0 ft | — | — | 0.9 ft |
| Fri, Jul 31 | 5:56 AM | 6:54 PM | Low2:49 PM0.2 ft | High10:50 PM1.0 ft | — | — | 0.8 ft |
| Sat, Aug 1 | 5:57 AM | 6:53 PM | Low6:27 AM0.4 ft | High10:11 AM0.5 ft | Low3:38 PM0.3 ft | High11:13 PM0.9 ft | 0.6 ft |
| Sun, Aug 2 | 5:57 AM | 6:53 PM | Low6:27 AM0.4 ft | High11:35 AM0.6 ft | Low4:40 PM0.4 ft | High11:27 PM0.8 ft | 0.4 ft |
| Mon, Aug 3 | 5:57 AM | 6:52 PM | Low6:23 AM0.3 ft | High12:48 PM0.7 ft | Low6:03 PM0.5 ft | High11:28 PM0.7 ft | 0.4 ft |
| Tue, Aug 4 | 5:58 AM | 6:52 PM | Low6:40 AM0.2 ft | High2:02 PM0.8 ft | Low8:25 PM0.6 ft | High11:28 PM0.6 ft | 0.6 ft |
| Wed, Aug 5 | 5:58 AM | 6:51 PM | Low7:09 AM0.1 ft | High3:18 PM0.9 ft | — | — | 0.8 ft |
| Thu, Aug 6 | 5:58 AM | 6:51 PM | Low7:46 AM0.0 ft | High4:28 PM1.0 ft | — | — | 1.0 ft |
| Fri, Aug 7 | 5:58 AM | 6:50 PM | Low8:29 AM-0.1 ft | High5:30 PM1.0 ft | — | — | 1.1 ft |
| Sat, Aug 8 | 5:59 AM | 6:50 PM | Low9:19 AM-0.2 ft | High6:25 PM1.1 ft | — | — | 1.3 ft |
| Sun, Aug 9 | 5:59 AM | 6:49 PM | Low10:15 AM-0.2 ft | High7:17 PM1.1 ft | — | — | 1.3 ft |
| Mon, Aug 10 | 5:59 AM | 6:49 PM | Low11:16 AM-0.2 ft | High8:05 PM1.2 ft | — | — | 1.4 ft |
| Tue, Aug 11 | 6:00 AM | 6:48 PM | Low12:18 PM-0.1 ft | High8:48 PM1.1 ft | — | — | 1.2 ft |
| Wed, Aug 12 | 6:00 AM | 6:48 PM | Low1:19 PM0.0 ft | High9:26 PM1.1 ft | — | — | 1.1 ft |
| Thu, Aug 13 | 6:00 AM | 6:47 PM | Low4:38 AM0.5 ft | High7:46 AM0.5 ft | Low2:17 PM0.1 ft | High10:00 PM1.0 ft | 0.9 ft |
| Fri, Aug 14 | 6:00 AM | 6:46 PM | Low4:57 AM0.4 ft | High9:29 AM0.6 ft | Low3:15 PM0.3 ft | High10:29 PM0.9 ft | 0.6 ft |
| Sat, Aug 15 | 6:01 AM | 6:46 PM | Low5:17 AM0.4 ft | High10:45 AM0.7 ft | Low4:18 PM0.4 ft | High10:56 PM0.8 ft | 0.4 ft |
| Sun, Aug 16 | 6:01 AM | 6:45 PM | Low5:34 AM0.3 ft | High11:51 AM0.8 ft | Low5:45 PM0.5 ft | High11:15 PM0.7 ft | 0.5 ft |
| Mon, Aug 17 | 6:01 AM | 6:44 PM | Low5:53 AM0.3 ft | High12:56 PM0.8 ft | Low7:40 PM0.5 ft | High11:11 PM0.6 ft | 0.5 ft |
| Tue, Aug 18 | 6:01 AM | 6:44 PM | Low6:20 AM0.2 ft | High2:05 PM0.8 ft | — | — | 0.6 ft |
| Wed, Aug 19 | 6:02 AM | 6:43 PM | Low6:54 AM0.1 ft | High3:21 PM0.9 ft | — | — | 0.8 ft |
About Johns Folly Bay, St. John Island tides
Tide predictions for Johns Folly Bay, St. John Island come from NOAA station 9751274 (Puerto Rico), 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.
Johns Folly Bay, St. John Island 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 Johns Folly Bay, St. John Island today?+
Today (Tuesday, July 21), high tide at Johns Folly Bay, St. John Island is at 12:12 AM (0.6 ft), 4:35 PM (0.7 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Johns Folly Bay, St. John Island today?+
Today, low tide at Johns Folly Bay, St. John Island is at 8:10 AM (0.1 ft).
What tidal datum do these Johns Folly Bay, St. John Island 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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