High Surf Advisory — Coastal Nassau, FL, Coastal Duval, FL, Coastal Flagler, FL, Northeast Coastal St. Johns, FL, Southeast Coastal St. Johns, FL, Coastal Glynn, GA, Coastal Camden, GA 1:00 AM

Southeast Coastal St. Johns, FL

Last updated: 6:47 PM CDT  ·  Refresh
21°C
Feels like 19°
Clear
▲ 23°  /  ▼ 11°
Wind
4 mph E
Humidity
47%
Dew Point
9°
Pressure
30.20 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
7:08 AM
Sunset
6:30 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Southeast Coastal St. Johns is currently clear at 21°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:08AM · Sunset: 6:30PM.

Alerts

High Surf Advisory
Coastal Nassau, FL, Coastal Duval, FL, Coastal Flagler, FL, Northeast Coastal St. Johns, FL, Southeast Coastal St. Johns, FL, Coastal Glynn, GA, Coastal Camden, GA
Expires 1:00 AM
36 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
11%
7 PM
21°
10%
8 PM
20°
10%
9 PM
18°
3%
10 PM
17°
3%
11 PM
17°
3%
12 AM
16°
3%
1 AM
16°
3%
2 AM
16°
3%
3 AM
14°
3%
4 AM
14°
3%
5 AM
11°
3%
6 AM
11°
3%
7 AM
11°
3%
8 AM
13°
3%
9 AM
16°
3%
10 AM
18°
3%
11 AM
20°
3%
12 PM
21°
3%
1 PM
25°
3%
2 PM
26°
3%
3 PM
26°
3%
4 PM
25°
3%
5 PM
23°
3%
7-Day Forecast
Tonight
23° 11°
Clear.
Mon
27° 11°
Mostly Clear.
Tue
29° 14°
Mostly Clear.
Wed
30° 13°
Clear.
Thu
32° 13°
Clear.
Fri
32° 13°
Clear.
Sat
30° 13°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 21° Clear 11% 4 mph E 46%
7 PM 21° Clear 10% 4 mph E 49%
8 PM 20° Clear 10% 4 mph ESE 55%
9 PM 18° Clear 3% 4 mph ESE 61%
10 PM 17° Mostly Clear 3% 4 mph E 64%
11 PM 17° Partly Cloudy 3% 4 mph E 65%
12 AM 16° Partly Cloudy 3% 4 mph ENE 66%
1 AM 16° Mostly Cloudy 3% 5 mph ENE 66%
2 AM 16° Mostly Cloudy 3% 5 mph ENE 64%
3 AM 14° Mostly Cloudy 3% 6 mph ENE 63%
4 AM 14° Partly Cloudy 3% 6 mph ENE 61%
5 AM 11° Partly Cloudy 3% 6 mph ENE 61%
6 AM 11° Mostly Clear 3% 6 mph ENE 61%
7 AM 11° Mostly Clear 3% 6 mph ENE 57%
8 AM 13° Mostly Clear 3% 7 mph ENE 51%
9 AM 16° Mostly Clear 3% 7 mph ENE 44%
10 AM 18° Mostly Clear 3% 6 mph ENE 41%
11 AM 20° Mostly Clear 3% 6 mph ENE 38%
12 PM 21° Mostly Clear 3% 6 mph ENE 35%
1 PM 25° Mostly Clear 3% 6 mph ENE 33%
2 PM 26° Mostly Clear 3% 6 mph ENE 32%
3 PM 26° Mostly Clear 3% 6 mph ENE 30%
4 PM 25° Mostly Clear 3% 6 mph ENE 31%
5 PM 23° Mostly Clear 3% 5 mph ENE 35%
15-Day Forecast
Today
10/18
Clear
11%
11°
23°
Mon
10/19
Mostly Clear
3%
11°
27°
Tue
10/20
Mostly Clear
3%
14°
29°
Wed
10/21
Clear
3%
13°
30°
Thu
10/22
Clear
3%
13°
32°
Fri
10/23
Clear
3%
13°
32°
Sat
10/24
Clear
3%
13°
30°
Sun
10/25
Mostly Cloudy
3%
13°
30°
Mon
10/26
Mostly Clear
15%
13°
29°
Tue
10/27
Mostly Cloudy
35%
15°
30°
Wed
10/28
Mostly Cloudy
44%
15°
28°
Thu
10/29
Drizzle
60%
14°
29°
Fri
10/30
Drizzle
60%
16°
30°
Sat
10/31
Drizzle
60%
16°
30°
Sun
11/1
Drizzle
60%
16°
29°
36
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
36 AQI 6.5 µg/m³
O3
Ground-level ozone
35 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 36 Good 35 36
Tue 41 Good 35 41
Wed 47 Good 37 47
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sun Oct 18, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE4 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index12.1
Kinematics
0–6 km Shear13 kt
0–1 km Shear5 kt
Eff. Shear—
0–1 km SRH-2
0–3 km SRH-22
Eff. SRH—
Storm Motion48° @ 19 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-25.5
Thermo & Levels
PWAT0.55 in
0–3 km LR3.6 °C/km
700–500 LR6.8 °C/km
Total Totals24.9
LCL855 hPa
LFC—
EL—
Freezing Lvl15,541 ft