Weather Newca tle Co Down: Today’ Foreca t & 7-Day Outlook

Anyone checking the weather in Newcastle, County Down this week wants a clear picture before heading to the beach or up Slieve Donard. The good news: the next few days look largely dry and bright, with temperatures climbing to a pleasant 23°C by Tuesday. Whether you need the hour-by-hour outlook or a seven-day plan, we have the details from the most reliable sources.

Current temperature: 19°C ·
Next hour forecast: 19°C ·
Wind direction: Light northerly ·
Chance of rain: Below 10% ·
UV index: Moderate

Five key numbers sum up the conditions now and for the rest of today:

What is the weather in Newcastle, County Down today?

Right now the Met Office (UK’s national weather service) reports a temperature of 19°C under mostly clear skies. The next hour holds steady at 19°C, with light northerly winds keeping the air fresh rather than still. Precipitation chance stays below 10% through the afternoon, and the UV index is moderate – factor in sunscreen if you are spending time outdoors.

Hour by hour breakdown

• 12:00 – 19°C, partly cloudy (Met Office (UK’s national weather service))
• 13:00 – 19°C, sunny intervals (Met Office (UK’s national weather service))
• 14:00 – 18°C, hazy sun (Met Office (UK’s national weather service))
• 15:00 – 18°C, dry (Met Office (UK’s national weather service))
• 16:00 – 17°C, clear (Met Office (UK’s national weather service))
• 17:00 – 16°C, clear (Met Office (UK’s national weather service))
• 18:00 – 15°C, clear (Met Office (UK’s national weather service))

Wind and precipitation details

Winds stay light from the north, rarely gusting above 10 km/h. The AccuWeather (global weather forecaster) puts the precipitation chance at 6% for the afternoon – negligible enough that you can leave the umbrella behind. Tonight will see clear skies, with temperatures falling to around 10°C by dawn.

The implication: the rest of today offers good conditions for outdoor activities, with a cool evening requiring extra layers.

What is the 7-day weather forecast for Newcastle, County Down?

The week ahead looks predominantly dry, with a warm Tuesday standing out. Below are the day-by-day highs as reported by the Met Office (UK’s national weather service).

Tuesday high of 23°C

Tuesday looks set to be the warmest day of the week, with the Met Office (UK’s national weather service) forecasting a maximum of 23°C under sunny intervals. It is the kind of day that draws walkers to the Mourne Mountains and families to the beach. Light winds from the north maintain comfortable conditions.

Wednesday high of 21°C

Wednesday stays pleasant at 21°C, though cloud may build later. The Met Office suggests a low chance of any rain – around 10% – making it another safe bet for outdoor plans.

Thursday high of 18°C

A dip arrives Thursday, with the mercury at 18°C. Cloud cover thickens, but the Met Office still keeps the rain chance below 30%. It will feel cooler, especially if the northerly breeze picks up.

What this means: plan outdoor activities for Tuesday and Wednesday; Thursday requires flexibility.

How to get the most accurate forecast for Newcastle, County Down

Forecasts vary across platforms, so following a methodical approach helps you plan with confidence. Here are three steps to check the weather you can trust.

1. Start with the Met Office. The Met Office (UK’s national weather service) provides hourly and daily forecasts specifically for Newcastle, County Down – not to be confused with Newcastle upon Tyne, which has a separate Met Office page with a different outlook.
2. Cross-check with a second source. AccuWeather (global weather forecaster) offers a 10-day perspective and often highlights precipitation hours. Compare its data with the Met Office to spot any large discrepancies.
3. Check extended trends with The Weather Network. The Weather Network (Canadian meteorological service) provides a 14-day outlook for Newcastle Co. Down, useful for spotting long-range tendencies even if day-to-day accuracy is lower beyond seven days.

The implication: no single source is perfect, but using the Met Office as your anchor and one secondary service for corroboration gives you the best chance of avoiding a surprise.

What we know and what’s unclear

The Met Office (UK’s national weather service) data gives us high confidence in the next three days. Beyond that, models diverge.

• Confirmed: Today’s high of 19°C (Met Office (UK’s national weather service)), Tuesday’s 23°C (Met Office (UK’s national weather service)), Wednesday’s 21°C (Met Office (UK’s national weather service)), Thursday’s 18°C (Met Office (UK’s national weather service)).
• Unclear: Exact rainfall amounts after Thursday (The Weather Network (Canadian meteorological service)); 30-day forecast reliability is low (The Weather Network); UV index levels beyond today are not specified by the Met Office (Met Office (UK’s national weather service)); wind speeds on Friday may vary from light to moderate (AccuWeather (global weather forecaster)).

“Newcastle, County Down will see a maximum of 23°C on Tuesday with sunny intervals.”

— Met Office (UK’s national weather service)

“The 5/26 forecast for Newcastle shows 68°F (20°C) with a 3% precipitation chance – sunny to partly cloudy.”

— AccuWeather (global weather forecaster)

For anyone planning a hike in the Mourne Mountains this week, the message is clear: the first half of the week offers the best window, with Tuesday as the standout day. Beyond Thursday, the confidence drops – check back for updated guidance from the Met Office before committing to weekend plans.

For those seeking a more focused look at local conditions, the weather forecast for Newcastle Co Down offers detailed hourly and 7-14 day outlooks tailored to the area.

Frequently asked questions

Related reading

• Weather in Glasgow Today – Your Complete Weather Guide
• BBC Weather Stratford upon Avon: 10-Day Forecast & Updates

For the most reliable day-to-day guidance, rely on the Met Office and update your plans as the week progresses.