30YearWeather
Galway in September
Galway weather in September - Ireland
🌤️Mild & Comfortable

Galway Weather in September

Plan your September trip to Galway, Ireland. Based on 30 years of NASA data, expect temperatures of 17°C (high) to 11°C (low), with 33% rain probability and 8 hours of daily sunshine. The Coastal Waters averages 16°C in September. Pack rain gear for around 30 rainy days.

Avg High
17°C

Hottest around day 6

Avg Low
11°C

Coolest around day 26

Rainy Days
30days

33% avg rain chance

Sunshine
8hrs/day

Autumn season

Sea Temperature in September

Coastal Waters(Ocean)

16.2°C

Monthly Average

Water Feel
💧Refreshing

Consider a wetsuit for extended swimming

Swim Rating
🏄Cool, wetsuits recommended

Based on average sea surface temperature

Body of Water
Coastal Waters

Ocean

Galway coastline

Galway September Weather Calendar

Click any day to see detailed weather information

Day 1
cloudy
Cloudy
18°C27%
Day 2
cloudy
Cloudy
18°C26%
Day 3
cloudy
Cloudy
18°C26%
Day 4
cloudy
Cloudy
18°C29%
Day 5
cloudy
Cloudy
18°C28%
Day 6
cloudy
Cloudy
18°C29%
Day 7
cloudy
Cloudy
18°C29%
Day 8
cloudy
Cloudy
18°C33%
Day 9
cloudy
Cloudy
18°C36%
Day 10
cloudy
Cloudy
17°C37%
Day 11
cloudy
Cloudy
17°C38%
Day 12
rain
Rainy
17°C41%
Day 13
rain
Rainy
16°C42%
Day 14
cloudy
Cloudy
16°C37%
Day 15
cloudy
Cloudy
16°C38%
Day 16
cloudy
Cloudy
17°C36%
Day 17
cloudy
Cloudy
17°C34%
Day 18
cloudy
Cloudy
17°C29%
Day 19
cloudy
Cloudy
17°C30%
Day 20
cloudy
Cloudy
17°C28%
Day 21
cloudy
Cloudy
16°C28%
Day 22
cloudy
Cloudy
16°C27%
Day 23
cloudy
Cloudy
16°C29%
Day 24
cloudy
Cloudy
16°C28%
Day 25
cloudy
Cloudy
15°C33%
Day 26
cloudy
Cloudy
15°C32%
Day 27
cloudy
Cloudy
15°C34%
Day 28
cloudy
Cloudy
15°C39%
Day 29
cloudy
Cloudy
15°C40%
Day 30
cloudy
Cloudy
15°C39%

Essential Travel Info for Galway

🗓️ Best Time to Visit📖 Travel Guide🍴 Food Guide

Currency

EUR

€ Euro

Language

English

+1 more

Driving

Left side

Connect

As of 2025, Galway has 5G with all Irish...

Safety

Very High Safety

GPI: 1.288

Travel Intelligence

Exclusive flight analytics & health data for Galway

Smart Flight Estimator

Airport-to-Airport Logistics

unlock smart flight estimates

Add your home location in settings to see airport details.

Health & Safety Advisory

CDC travel health recommendations

6 Recommendations
COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Ireland. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Ireland.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Ireland.If rabies exposures occur while in Ireland, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Yellow Fever

CDC recommendations:Vaccine isnotrecommended.Country entry requirements:Vaccine isnotrequired.Updated April 23, 2025

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Galway?

👌Decent conditions for most activities
Short Answer

Perfect travel weather awaits in Galway during September - 17°C highs, 82% humidity, and 33% rain probability make this an optimal time for outdoor activities.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

82% average humidity

Health precautions needed

Be aware of: Leptospirosis, Hantavirus, Parvovirus B19

Shoulder season - balanced conditions

50% of peak - good value with moderate crowds

Good For

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

  • 🎯
    Adventure seekers

    1.04m waves - good for surfing and water sports

Who Should Avoid

  • 🏖️
    Beach lovers

    Sea temperature only 16.2°C - too cold for comfortable swimming

  • 👴
    Elderly travelers

    82% humidity creates difficult conditions

  • 📸
    Photographers

    76% cloud cover limits natural light opportunities

Related Guides

Best Time to VisitWhen to AvoidGalway Overview
900 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Galway in September averages 17°C with 33% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Galway in September

What are the temperatures in Galway in September?

Daytime highs average 17°C, nights drop to 11°C. Temperatures remain fairly consistent.

How many rainy days in Galway in September?

Expect around 30 days with measurable rainfall. An umbrella is advisable.

What to wear in Galway in September?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is September peak season in Galway?

This is shoulder season—moderate prices and manageable crowds.