Fort McHenry Marsh Tides Today
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Fort McHenry Marsh runs a mean tidal range of about 1.1 ft. This month the highest water, 1.8 ft, comes on the evening of Nov 25, and the lowest, a -0.3 ft minus tide, on the afternoon of Nov 26.
| High tide | 2:07 AM | 1.5 ft |
| Low tide | 8:59 AM | 0.2 ft |
| High tide | 2:43 PM | 1.4 ft |
| Low tide | 9:21 PM | 0.4 ft |
Today on the water at Fort McHenry Marsh
Today at Fort McHenry Marsh: high tide at 2:07 AM (1.5 ft) and 2:43 PM (1.4 ft), low tide at 8:59 AM (0.2 ft) and 9:21 PM (0.4 ft). The National Weather Service forecast for this afternoon is mostly sunny with SE winds 9 mph, 75°F. Sunrise is at 6:36 AM and sunset at 5:03 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| This Afternoon | Mostly Sunny | SE 9 mph | 75°F |
| Tonight | Mostly Cloudy | S 7 mph | 63°F |
Forecast: National Weather Service point forecast for this location.
Where Fort McHenry Marsh is
Fort McHenry Marsh sits at 39.2617° N, 76.5850° W on the Chesapeake Bay, at Baltimore, MD. The station here is a historical NOAA reference station: a gauge measured the tide at this spot from 2004 until 2005, and NOAA still publishes harmonic predictions from that record. There is no live reading here today. The closest gauge measuring live water level is Baltimore, Fort McHenry (NOAA 8574680), 0.5 mi away, and the tide here runs on nearly the same clock. The nearest weather station is Baltimore, MD, a shore station reporting wind and, at most sites, water temperature, 0.5 mi away.
The tide at Fort McHenry Marsh
Fort McHenry Marsh has a mixed tide: two highs and two lows a day, but of unequal size, so one low each day drains a little lower than the other. This month's predictions average 2.0 high tides a day here. The mean range from lower low to higher high is 1.7 ft, and 1.1 ft between the average high and the average low, a small tide. On an average day the higher high tops the lower high by 0.3 ft and the lower low sits 0.2 ft below the other low. For the water around it: Chesapeake tides are semidiurnal but small, 1 to 3 ft, and arrive many hours after the ocean tide as the wave works up the bay and its rivers.
About this station
- High tide reaches Fort McHenry Marsh about 11.5 hours after the moon passes overhead. That lag is local, which is why high water does not line up with the moon.
Datum and source
Heights on this page are feet above mean lower low water (MLLW), the zero NOAA's nautical charts use for soundings. A predicted 0.0 ft low is the average of the lower low each day; a minus tide is water below chart datum, and a 2 ft high means 2 ft more water than the chart shows. NOAA fixes MLLW at Fort McHenry Marsh from the 1983-2001 National Tidal Datum Epoch; mean higher high water is 1.7 ft above it and mean sea level 0.8 ft. These datums are controlled from NOAA's Baltimore, MD gauge. Source: NOAA CO-OPS station 8574683, established 2004, gauge removed 2005. The tide times and heights are NOAA's official harmonic predictions for this station; TidalMap republishes them daily and does not alter them.
Tide stations near Fort McHenry Marsh
- Baltimore, Fort McHenry: 0.5 mi, tides at about the same time
- Stony Creek: 7.5 mi, tides at about the same time
- Tolchester Beach: 18.5 mi, tides about 18 min later
- Annapolis (US Naval Academy): 20.0 mi, tides about 99 min earlier
- Edgewater, South River: 21.6 mi, tides about 120 min earlier
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Fort McHenry Marsh this month: Nov 1, Nov 7, Nov 8, Nov 9, Nov 10, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27. These spring highs push water furthest up into the marsh grass.
🔻 Negative (minus) low tides at Fort McHenry Marsh this month: Nov 23, Nov 24, Nov 25, Nov 26, Nov 27, Nov 28, Nov 29. These drain the flats and leave the bars and marsh banks high and dry.
Best fishing times (solunar)
Major and minor solunar windows for Fort McHenry Marsh, peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).
| Day | Major windows | Minor windows | Score |
|---|---|---|---|
| Today 🌗 | 7:20–9:20 AM 7:45–9:45 PM | 12:48–2:48 AM 1:41–3:41 PM | 61 |
| Thu Nov 5 🌘 | 8:06–10:06 AM 8:31–10:31 PM | 1:57–3:57 AM 2:04–4:04 PM | 73 |
| Fri Nov 6 🌘 | 8:51–10:51 AM 9:16–11:16 PM | 3:04–5:04 AM 2:28–4:28 PM | 83 |
| Sat Nov 7 🌘 | 9:36–11:36 AM 10:01–12:01 AM | 4:10–6:10 AM 2:53–4:53 PM | 91 |
| Sun Nov 8 🌘 | 10:22–12:22 PM 10:47–12:47 AM | 5:16–7:16 AM 3:21–5:21 PM | 97 |
| Mon Nov 9 🌑 | 11:10–1:10 PM 11:35–1:35 AM | 6:21–8:21 AM 3:54–5:54 PM | 99 |
| Tue Nov 10 🌑 | 12:00–2:00 PM 12:25–2:25 AM | 7:24–9:24 AM 4:32–6:32 PM | 99 |
Predictions & observations: NOAA CO-OPS station 8574683. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.
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