Castalian Spring, TN Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Castalian Spring, TN.

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Current Conditions — Castalian Spring, TN

PORTLAND (K1M5)

Clear

55.4 F
Humidity:67%
Wind Speed: 8.1 mph
Barometer:30.13 in
Dewpoint:44.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 02:55 AM CDT
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5-Day Forecast — Castalian Spring, TN

Wednesday

High 82 °F
Mostly Sunny
Wednesday
Night
Low 53 °F
Mostly Clear
Thursday

High 84 °F
Partly Sunny
Thursday
Night
Low 59 °F
Partly Cloudy
Friday

High 82 °F
Chance of T-storms
Friday
Night
Low 62 °F
T-storms
Saturday

High 78 °F
T-storms Likely
Saturday
Night
Low 55 °F
Slight Chance of Showers
Sunday

High 82 °F
Slight Chance of Showers

Detailed Forecast — Castalian Spring, TN

Wednesday
Mostly Sunny. High near 82°F. Wind 2 to 7 mph, with gusts as high as 15 mph.
Wednesday Night
Mostly Clear. Low around 53°F. Wind 1 to 2 mph, with gusts as high as 7 mph.
Thursday
Partly Sunny. High near 84°F. Wind 3 to 8 mph, with gusts as high as 15 mph.
Thursday Night
Partly Cloudy. Low around 59°F. Wind around 3 mph, with gusts as high as 9 mph.
Friday
Chance of Thunderstorms. High near 82°F. Wind 6 to 10 mph, with gusts as high as 20 mph.
Friday Night
Thunderstorms. Low around 62°F. Wind around 1 mph, with gusts as high as 6 mph.
Saturday
Thunderstorms Likely. High near 78°F. Wind 3 to 5 mph, with gusts as high as 10 mph.
Saturday Night
Slight Chance of Showers. Low around 55°F. Wind around 1 mph, with gusts as high as 5 mph.
Sunday
Slight Chance of Showers. High near 82°F. Wind 2 to 5 mph, with gusts as high as 9 mph.
Sunday Night
Chance of Scattered Thunderstorms. Low around 59°F. Wind around 2 mph, with gusts as high as 7 mph.
Monday
Thunderstorms Likely. High near 80°F. Wind 12 to 13 mph, with gusts as high as 23 mph.
Monday Night
Rain Likely. Low around 62°F. Wind around 8 mph, with gusts as high as 17 mph.
Tuesday
Chance of Scattered Thunderstorms. High near 80°F. Wind 6 to 10 mph, with gusts as high as 17 mph.
TN Radar
Current Radar • TN
Day 1 Outlook • April 22, 2026

Observation History — Castalian Spring, TN

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
02:55 AM CDT 8.1 10.00 Clear -- 55.4 44.6 67% NA NA 30.13 1020.3
02:35 AM CDT S 8.1 10.00 Clear -- 55.4 44.6 67% NA NA 30.13 1020.3
02:15 AM CDT S 8.1 10.00 Clear -- 57.2 44.6 63% NA NA 30.14 1020.7
01:55 AM CDT 6.9 10.00 Clear -- 59.0 44.6 59% NA NA 30.14 1020.7
01:35 AM CDT 6.9 10.00 Clear -- 60.8 42.8 51% NA NA 30.15 1021.0
01:15 AM CDT 6.9 10.00 Clear -- 62.6 42.8 48% NA NA 30.15 1021.0
12:55 AM CDT 8.1 10.00 Clear -- 64.4 41.0 42% NA NA 30.15 1021.0
12:35 AM CDT SW 9.2 10.00 Clear -- 64.4 41.0 42% NA NA 30.15 1021.0
12:15 AM CDT 10.4 10.00 Clear -- 66.2 41.0 40% NA NA 30.15 1021.0
11:55 PM CDT 11.4 10.00 Clear -- 66.2 42.8 43% NA NA 30.15 1021.0
11:35 PM CDT SW 10.4 G 17.3 10.00 Clear -- 66.2 42.8 43% NA NA 30.15 1021.0
11:15 PM CDT 9.2 10.00 Clear -- 64.4 42.8 45% NA NA 30.16 1021.3
10:55 PM CDT S 6.9 10.00 Clear -- 60.8 42.8 51% NA NA 30.16 1021.3
10:35 PM CDT 10.00 Clear -- NULL % NA NA M
10:15 PM CDT 5.7 10.00 Clear -- 64.4 41.0 42% NA NA 30.16 1021.3
09:55 PM CDT 8.1 10.00 Clear -- 66.2 39.2 37% NA NA 30.15 1021.0
09:35 PM CDT SW 5.8 10.00 Clear -- 68.0 39.2 35% NA NA 30.16 1021.3
09:15 PM CDT SW 6.9 10.00 Clear -- 68.0 39.2 35% NA NA 30.15 1021.0
08:55 PM CDT SW 6.9 10.00 Clear -- 68.0 39.2 35% NA NA 30.15 1021.0
08:35 PM CDT 6.9 10.00 Clear -- 68.0 39.2 35% NA NA 30.15 1021.0
08:15 PM CDT SW 6.9 10.00 Clear -- 69.8 39.2 33% NA NA 30.14 1020.7
07:55 PM CDT 5.8 10.00 Clear -- 71.6 39.2 31% NA 70.0 30.13 1020.3
07:35 PM CDT SW 5.7 10.00 Clear -- 71.6 39.2 31% NA 70.0 30.13 1020.3
07:15 PM CDT SW 9.2 10.00 NULL -- 73.4 39.2 29% NA 71.8 30.13 1020.3

Regional Weather Observation

PORTLAND (K1M5)

Clear
55.4 F

GALLATIN (KXNX)

Clear
NULL F

SPINGFIELD (KM91)

Partly Cloudy
59.0 F

BOWLING GREE (KBWG)

Clear
59.0 F

LEBANON (KM54)

Clear
57.2 F

NASHVILLE (KBNA)

Clear
55.4 F
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