As of 06:50 BST

Weather in Castlerock

+8°

Castlerock, Wednesday, 7 October, 06:50

Partly cloudy. Feels like 6°C. High 13°C, low 8°C.

Pressure1018 mb

Wind7 mph W

Humidity89%

Visibility6.2 mi

Dew point7°C

Detailed hourly forecast

The month ahead in Castlerock: daytime temperatures averaging +14.6° and +10.5° overnight — that is 2.1° above the climate average for October. Rain is expected on 8 days (around 41 mm), against a normal of 9 days and 49 mm. The warmest day should be 13 October (+16.7°), the coolest 7 October (+7.9°).

+14.6°/+10.5°

Average day / night

+2.1°

Above average

8 / 9

Wet days / normal

41 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+15°	+12.8°	+2.2°
17 October – 26 October	+13.9°	+11.8°	+2.1°
27 October – 5 November	near average	+11°	—

October records over 66 years

+20.2°8 October 2023All-time high

+0.8°30 October 2018All-time low

Climate averages and records are calculated from the nearest reference point — Portstewart (5.7 km away).

Thu, 08+10 ° /16 °

10.1

+16 °

Castlerock, Thursday, 8 October

Rain. High 16°C, low 10°C.

Pressure1022 mb

Wind9 mph SW

Humidity70%

Visibility6.2 mi

Dew point6°C

Fri, 09+12 ° /16 °

4.7

+16 °

Castlerock, Friday, 9 October

Light rain. High 16°C, low 12°C.

Pressure1006 mb

Wind19 mph W

Humidity74%

Visibility6.2 mi

Dew point8°C

Sat, 10+10 ° /13 °

2.4

+13 °

Castlerock, Saturday, 10 October

Light rain. High 13°C, low 10°C.

Pressure1008 mb

Wind24 mph W

Humidity67%

Visibility6.2 mi

Dew point6°C

Sun, 11+10 ° /14 °

0.4

+14 °

Castlerock, Sunday, 11 October

Light rain. High 14°C, low 10°C.

Pressure1013 mb

Wind14 mph W

Humidity68%

Visibility—

Dew point7°C

Mon, 12+10 ° /16 °

3.6

+16 °

Castlerock, Monday, 12 October

Light rain. High 16°C, low 10°C.

Pressure1008 mb

Wind18 mph S

Humidity89%

Visibility—

Dew point13°C

Tue, 13+10 ° /17 °

4.4

+17 °

Castlerock, Tuesday, 13 October

Rain. High 17°C, low 10°C.

Pressure1018 mb

Wind20 mph W

Humidity75%

Visibility—

Dew point9°C

Wed, 14+10 ° /15 °

0.1

+15 °

Castlerock, Wednesday, 14 October

Light rain. High 15°C, low 10°C.

Pressure1024 mb

Wind18 mph SW

Humidity87%

Visibility—

Dew point11°C

Thu, 15+14 ° /16 °

+16 °

Castlerock, Thursday, 15 October

Overcast. High 16°C, low 14°C.

Pressure1022 mb

Wind20 mph SW

Humidity79%

Visibility—

Dew point11°C

Fri, 16+13 ° /15 °

3.8

+15 °

Castlerock, Friday, 16 October

Light rain. High 15°C, low 13°C.

Pressure1009 mb

Wind23 mph S

Humidity81%

Visibility—

Dew point11°C

Sat, 17+10 ° /15 °

9.4

+15 °

Castlerock, Saturday, 17 October

Rain. High 15°C, low 10°C.

Pressure1007 mb

Wind22 mph S

Humidity67%

Visibility—

Dew point6°C

Sun, 18+9 ° /12 °

+12 °

Castlerock, Sunday, 18 October

Overcast. High 12°C, low 9°C.

Pressure1017 mb

Wind14 mph NE

Humidity82%

Visibility—

Dew point9°C

Mon, 19+11 ° /13 °

+13 °

Castlerock, Monday, 19 October

Overcast. High 13°C, low 11°C.

Pressure1024 mb

Wind9 mph N

Humidity81%

Visibility—

Dew point9°C

Tue, 20+9 ° /14 °

+14 °

Castlerock, Tuesday, 20 October

Overcast. High 14°C, low 9°C.

Pressure1031 mb

Wind6 mph S

Humidity80%

Visibility—

Dew point9°C

Wed, 21+11 ° /15 °

+15 °

Castlerock, Wednesday, 21 October

Clear sky. High 15°C, low 11°C.

Pressure1031 mb

Wind6 mph S

Humidity78%

Visibility—

Dew point10°C

Thu, 22+11 ° /14 °

+14 °

Castlerock, Thursday, 22 October

Overcast. High 14°C, low 11°C.

Pressure1029 mb

Wind8 mph SE

Humidity81%

Visibility—

Dew point10°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+9 ° /12 °

3.1

+12 °

Castlerock, Friday, 23 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low9°C

Average rainfall3.1 mm

Chance of rain58%

Warmest on record+15° (1995)

Coldest on record+4° (1987)

Sat, 24+9 ° /12 °

4.7

+12 °

Castlerock, Saturday, 24 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low9°C

Average rainfall4.7 mm

Chance of rain52%

Warmest on record+16° (2005)

Coldest on record+4° (1987)

Sun, 25+8 ° /12 °

3.8

+12 °

Castlerock, Sunday, 25 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low8°C

Average rainfall3.8 mm

Chance of rain60%

Warmest on record+15° (2024)

Coldest on record+2° (2019)

Mon, 26+8 ° /12 °

3.2

+12 °

Castlerock, Monday, 26 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low8°C

Average rainfall3.2 mm

Chance of rain58%

Warmest on record+17° (2005)

Coldest on record+3° (2019)

Tue, 27+9 ° /12 °

3.9

+12 °

Castlerock, Tuesday, 27 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low9°C

Average rainfall3.9 mm

Chance of rain62%

Warmest on record+18° (2005)

Coldest on record+4° (2018)

Wed, 28+8 ° /11 °

3.9

+11 °

Castlerock, Wednesday, 28 October

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low8°C

Average rainfall3.9 mm

Chance of rain55%

Warmest on record+16° (2009)

Coldest on record+2° (2018)

Thu, 29+8 ° /11 °

2.6

+11 °

Castlerock, Thursday, 29 October

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low8°C

Average rainfall2.6 mm

Chance of rain48%

Warmest on record+15° (2009)

Coldest on record+2° (2018)

Fri, 30+8 ° /12 °

2.2

+12 °

Castlerock, Friday, 30 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low8°C

Average rainfall2.2 mm

Chance of rain52%

Warmest on record+15° (2009)

Coldest on record+1° (2018)

Sat, 31+8 ° /11 °

3.9

+11 °

Castlerock, Saturday, 31 October

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low8°C

Average rainfall3.9 mm

Chance of rain53%

Warmest on record+16° (2014)

Coldest on record+3° (2018)

Sun, 01+8 ° /11 °

3.9

+11 °

Castlerock, Sunday, 1 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low8°C

Average rainfall3.9 mm

Chance of rain63%

Warmest on record+15° (2007)

Coldest on record+2° (2018)

Mon, 02+7 ° /11 °

3.5

+11 °

Castlerock, Monday, 2 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low7°C

Average rainfall3.5 mm

Chance of rain65%

Warmest on record+16° (1971)

Coldest on record+2° (2023)

Tue, 03+7 ° /10 °

+10 °

Castlerock, Tuesday, 3 November

Climate average for this date — the mean of the last 60 years.

Average high10°C

Average low7°C

Average rainfall3 mm

Chance of rain57%

Warmest on record+16° (1979)

Coldest on record+3° (1966)

Wed, 04+7 ° /10 °

3.1

+10 °

Castlerock, Wednesday, 4 November

Climate average for this date — the mean of the last 60 years.

Average high10°C

Average low7°C

Average rainfall3.1 mm

Chance of rain55%

Warmest on record+15° (1978)

Coldest on record+0° (1968)

Thu, 05+7 ° /10 °

3.1

+10 °

Castlerock, Thursday, 5 November

Climate average for this date — the mean of the last 60 years.

Average high10°C

Average low7°C

Average rainfall3.1 mm

Chance of rain62%

Warmest on record+15° (2025)

Coldest on record+3° (2000)

Questions about the month ahead

How accurate is a month-long forecast?

The first 16 days come from weather models — highly reliable for the first 3–5 days, gradually less so after that. Days 17 to 30 for Castlerock are built from climate averages over the last 60 years, so they show typical weather for those dates rather than a specific forecast.

What does "above average" mean?

We compare the forecast with the climate average for exactly the same calendar days, calculated from 60 years of observations. The difference shows how the coming month compares with a typical one.

Where do the 66-year records come from?

These are real historical extremes recorded in Castlerock since 1960: the highest and lowest temperature for each calendar date, with the year it happened.

How often is the 30-day forecast updated?

The forecast portion refreshes every hour. The climate portion is based on long-term data and stays stable.