Castlereagh Weather in May

With daytime temperatures of 14°C (57°F) and nighttime lows of 8°C (46°F), May in Castlereagh brings moderate temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 77 mm (3 in) falls on average.

Rainfall in Castlereagh in May

Historically, the month has about 16 days of rain, averaging 77 mm (3 in) in total. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Castlereagh in May

May in Castlereagh brings typical temperatures with highs around 14°C (57°F) and lows of 8°C (46°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Castlereagh in May

The area enjoys a balanced 184 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Wind Speed in Castlereagh in May

May sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in May

With water temperatures around 9°C (48°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

For Castlereagh itself, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.