Live Weather & Forecast
Weather in Carmarthen
Cymru / Wales, United Kingdom · Real-time conditions & 3-day outlook
11°C
Feels like 8°C
52°F / Feels 46°F
Partly cloudy
Carmarthen, Cymru / Wales
🌙 Nighttime
Updated: 2026-04-16 03:00
Humidity
94%
Wind
30.6 km/h SW
Wind Gust
46.9 km/h
Pressure
1013 mb
Visibility
6 km
UV Index
0
(Low)
Precipitation
0.19 mm
Cloud Cover
75%
Dew Point
8°C
Wind Degree
228°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
146.9 μg/m³
NO₂
1.5 μg/m³
O₃
91 μg/m³
SO₂
1 μg/m³
PM 2.5
6.4 μg/m³
PM 10
21.1 μg/m³
Today's Hourly Forecast
24-hour breakdown for Carmarthen, Cymru / Wales
12 AM
10°
Light rain shower
1 AM
10°
Light rain shower
2 AM
10°
Light rain shower
3 AM
11°
Partly cloudy
4 AM
9°
Patchy rain nearby
5 AM
9°
Patchy rain nearby
6 AM
8°
Patchy rain nearby
7 AM
8°
Partly Cloudy
8 AM
9°
Patchy rain nearby
9 AM
10°
Patchy rain nearby
10 AM
11°
Patchy rain nearby
11 AM
11°
Patchy rain nearby
12 PM
11°
Patchy rain nearby
1 PM
11°
Patchy rain nearby
2 PM
11°
Patchy rain nearby
3 PM
11°
Patchy rain nearby
4 PM
11°
Patchy rain nearby
5 PM
11°
Patchy rain nearby
6 PM
11°
Patchy rain nearby
7 PM
11°
Patchy rain nearby
8 PM
10°
Overcast
9 PM
9°
Patchy rain nearby
10 PM
9°
Light rain shower
11 PM
9°
Patchy rain nearby
3-Day Forecast
Daily overview for Carmarthen, Cymru / Wales
Today
Patchy rain nearby
11°
/
8°
🌧️ 96% chance of rain
💧 Avg. humidity: 90%
💨 Max wind: 38.9 km/h
🌧️ Total precip: 1.8 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:19 AM
🌇 Sunset: 08:16 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Patchy rain nearby
12°
/
8°
🌧️ 89% chance of rain
💧 Avg. humidity: 90%
💨 Max wind: 31.7 km/h
🌧️ Total precip: 2.18 mm
☀️ UV Index: 1
🌅 Sunrise: 06:17 AM
🌇 Sunset: 08:18 PM
🌙 New Moon
🌑 Moon: 0% lit
Sat, Apr 18
Patchy rain nearby
12°
/
5°
🌧️ 89% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 18 km/h
🌧️ Total precip: 0.48 mm
☀️ UV Index: 1
🌅 Sunrise: 06:14 AM
🌇 Sunset: 08:20 PM
🌙 Waxing Crescent
🌑 Moon: 1% lit
Best Time to Visit Carmarthen
Plan your trip to Carmarthen, United Kingdom around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Carmarthen?
Current conditions in Carmarthen: Partly cloudy, temperature 11°C, humidity 94%.
What is the best time to visit Carmarthen?
The best time to visit Carmarthen is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Carmarthen?
Carmarthen is located at approximately 51.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Carmarthen?
The wettest period in Carmarthen is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Carmarthen?
For visits to Carmarthen during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Carmarthen in?
Carmarthen is located in United Kingdom, in the state of Cymru / Wales.
What are the public holidays in Carmarthen in 2026?
View the 2026 public holidays for Carmarthen on our Holidays page.
What are the GPS coordinates used for the weather forecast in Carmarthen?
The weather forecast for Carmarthen uses coordinates 51.8591, -4.3116.