The weather. Told straight.

Weather in Portmarnock today: the honest forecast

Portmarnock

Weather’s a mood. Today’s a bad one.

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9°C

Clear Clear sky

Feels like
7°C
Wind
15 km/h
Humidity
81%
Rainfall
0 mm

Sunrise 07:52 Sunset 18:27

Air quality Fair

Updated 20:11 on 16/10/2026. Don’t be expecting miracles.

Tomorrow in Portmarnock

Saturday 17/10/2026

The sun’s stuck behind a cloud and won’t come out.

Clouds, high of 12°C, low of 4°C. 0 mm of rain, 0% chance. Wind up to 12 km/h.

The day after in Portmarnock

Sunday 18/10/2026

Overcast, but it’s grand. We’ve seen worse.

Clouds, high of 12°C, low of 5°C. 0 mm of rain, 0% chance. Wind up to 8 km/h.

Tomorrow in Portmarnock: the verdicts

  • Washing10/10 for washingEvery sheet in the house. Go.
  • Barbecue8/10 for barbecueA solid barbecue day by Irish standards.
  • A walk10/10 for a walkThe best walking weather you’ll get this week.
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Next 24 hours in Portmarnock

Sun’s hiding like it owes us money.

In 3-hour steps.

  1. 22:00 9° 0% chance of rain
  2. 01:00 8° 0% chance of rain
  3. 04:00 7° 0% chance of rain
  4. 07:00 4° 0% chance of rain
  5. 10:00 7° 0% chance of rain
  6. 13:00 12° 0% chance of rain
  7. 16:00 11° 0% chance of rain
  8. 19:00 7° 0% chance of rain

The days ahead in Portmarnock

  1. Sat 17/10 Clouds 12° / 4° 0 mm, 0% Grey sky, grey mood, grey tea. At least the tea’s hot.
  2. Sun 18/10 Clouds 12° / 5° 0 mm, 0% Same weather as yesterday, only worse.
  3. Mon 19/10 Rain 12° / 7° 0.6 mm, 89% Pourin’ down, ya muppet. Don’t be forgettin’ the brolly.
  4. Tue 20/10 Rain 13° / 8° 0.3 mm, 32% Rainin’ since Tuesday. Or maybe 2019. Hard to tell.
  5. Wed 21/10 Rain 11° / 7° 3.5 mm, 100% Pourin’. Stay in, put the heating on and mind the biscuits.

About the weather in Portmarnock

Portmarnock is in County Dublin, in the east and midlands, which are usually drier and calmer than the west. Inland spots get sharper frosts in winter and warmer afternoons in summer.

Portmarnock is in County Dublin, at about 53.42°N, 6.14°W. The closest places we cover are Malahide (3 km), Sutton (4 km), Raheny (5 km).

Across Ireland, spring is cool and bright with showers, summer highs are typically in the high teens with long evenings, autumn is the wettest and windiest stretch as the Atlantic fronts return, and winter is mild for the latitude with frost on clear nights. Rain can arrive in any month.

Quick answers for Portmarnock

What is the weather in Portmarnock right now?
It is 9°C in Portmarnock with clear sky, feeling like 7°C, with wind at 15 km/h.
Will it rain in Portmarnock tomorrow?
Rain is unlikely tomorrow in Portmarnock (a 0% chance).
What will the temperature be in Portmarnock tomorrow?
A high of 12°C and a low of 4°C, with wind around 12 km/h.
What time is sunset in Portmarnock today?
Sunrise is at 07:52 and sunset at 18:27.

Weather nearby

Beaches, hills and venues nearby

All weather in County Dublin