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Forecast Text · Potomac

Potomac · DC & Marshall Landing

Boater / angler outlook for Marshall Landing & DC — temps, wind, alerts, river, water temp, visibility, sun/moon, and tides.

NWS · 7:07 PM ET · live · forecast 4:52 PM ET

Model guidance

7-day GFS precip loop — Mid-Atlantic / Potomac zoom

Loading Mid-Atlantic zoom of MAG GFS precip…

GFS 6-hour precipitation — Mid-Atlantic zoom
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—
F—

NOAA/NWS NCEP MAG · GFS
Open on MAG

Live radar

US radar

Windy radar starting on the continental US — pinch/scroll to zoom into the Potomac.

Radar map via Windy.com · longer-range precip is the GFS loop above

NWS daily

7-Day High / Low

Δ is vs previous NWS run for that city and calendar day. First load may show — until the next refresh.

CityTodayOct 25TomorrowOct 26TueOct 27WedOct 28ThuOct 29FriOct 30SatOct 31
Washington, DC
—
47°
— · +5
70°
50°
0 · 0
70°
49°
+1 · +2
67°
50°
0 · +1
72°
51°
0 · 0
77°
54°
+2 · +1
73°
56°
0 · +1
Marshall Landing
—
47°
— · +6
70°
49°
+1 · -4
70°
53°
+2 · +2
67°
51°
+1 · +1
72°
53°
+1 · +1
76°
56°
+1 · +2
73°
58°
+1 · +2
NWS wind

Wind · Marshall Landing

NWS gridpoint wind at Marshall Landing (LWX). Direction is where wind is FROM. Speeds in mph.

Next 24h · every 3 hours
9p
↖ SE
2mph
12a
↗ SW
1mph
3a
↗ SW
2mph
6a
↗ SW
2mph
9a
→ W
2mph
12p
→ W
3mph
3p
↘ NW
3mph
6p
→ W
2mph
PeriodFromSpeedSky
Tonight↗ SW2 mphClear
Monday→ W5 mphSunny
Monday Night→ W1–6 mphClear
Tuesday↓ N6 mphSunny
Tuesday Night← E3 mphMostly Clear
Wednesday← E5 mphPartly Sunny
Wednesday Night↖ SE0–5 mphMostly Cloudy
Thursday↑ S0–3 mphMostly Sunny
Thursday Night↑ S3 mphMostly Clear
Friday→ W2 mphSunny
Friday Night↗ SW2 mphMostly Clear
Saturday← E1–5 mphMostly Sunny
Saturday Night↑ S5 mphMostly Cloudy
Sunday↑ S7 mphMostly Cloudy then Rain Showers
NWS alerts

Marine & weather alerts

Active NWS alerts for Marshall Landing and Washington, DC points.

No active NWS alerts for Marshall Landing / DC right now.
USGS · NOAA

River stage, flow & water temp

USGS instantaneous values — Little Falls is the reference Potomac gauge for the DC corridor.

Stage
3.05 ft
01646500
Flow
3,120 cfs
Little Falls
Water temp
60.8°F
NOAA DC gauge

Open USGS gauge · water temp 2026-10-25 18:54

Obs

Visibility, fog risk & pressure

Visibility from nearby airports (KDCA / KDAA / KADW). Fog risk from temp–dewpoint spread.

Watch for fog
Pressure
30.46 inHg
KDCA / KDAA
Max UV
—
NWS grid
SiteVisTempDewFogWx
KADW10 mi56°47°LowCLR
KDAA10 mi54°49°WatchCLR
KDCA10 mi61°48°LowCLR
KDAA10 mi—°—°LowClear
Sun & moon

Sunrise, sunset & moon

Sunrise/sunset computed for Marshall Landing; moon phase for local calendar day.

🌕
Full Moon
99% illuminated · age 13.8d
TodayOct 25
Sunrise7:28 PM
Sunset6:18 AM
Daylight10h 50m
TomorrowOct 26
Sunrise7:29 PM
Sunset6:17 AM
Daylight10h 48m
TueOct 27
Sunrise7:30 PM
Sunset6:16 AM
Daylight10h 46m
NOAA CO-OPS

Tide outlook · Washington, DC gauge

Tides are Washington, DC gauge (NOAA 8594900, MLLW). Applies to nearby Potomac sites including Marshall Landing with timing/height nuance.

Sun Oct 25
Low2:34 AM0.33 ft
High7:51 AM3.08 ft
Low2:32 PM0.26 ft
High8:03 PM3.43 ft
Mon Oct 26
Low3:22 AM0.28 ft
High8:33 AM3.08 ft
Low3:15 PM0.20 ft
High8:44 PM3.52 ft
Tue Oct 27
Low4:11 AM0.27 ft
High9:17 AM3.04 ft
Low3:59 PM0.20 ft
High9:27 PM3.55 ft
Wed Oct 28
Low5:01 AM0.29 ft
High10:02 AM2.97 ft
Low4:46 PM0.23 ft
High10:13 PM3.51 ft
Locations

Sites

Share card

Compose Potomac outlook PNG

Builds a shareable card with temps, wind, river snapshot, and next tides.

DC outlook card