Honestly, if you've lived in Southampton for more than a week, you know the drill. One minute you're looking at the Bargate in decent sunshine, and the next, you’re sprinting for cover under a shop awning because the heavens just opened. But the 10 day weather forecast southampton is looking a bit more "consistently grey" than usual as we move through mid-January 2026.
Right now, it's about 50°F (10°C) out there. Not exactly tropical, but for January? We’ve definitely had worse. The humidity is sitting high at 82%, making that 11 mph wind from the south feel a bit damp and clingy. If you’re heading out tonight, don’t trust the "partly sunny" labels from earlier today—light rain is pretty much the guest of honor for the foreseeable future.
What's actually happening over the next week?
The next few days are basically a repeat loop. Friday and Saturday are holding steady with highs of 50°F and lows around 42°F to 44°F. Expect light rain to kick in more frequently during the evenings. Sunday, January 18, looks like the "warmest" day of the lot—if you can call 51°F warm.
The interesting part of the 10 day weather forecast southampton starts around the middle of next week. While we’re stuck in this mild, cloudy Atlantic air for now, there’s a bit of a tug-of-war happening with a colder block of air trying to push in from the east.
By Wednesday, January 21, we start to see the numbers dip. We go from those comfortable-ish 50s down to 48°F, and by next weekend, we’re looking at highs of only 45°F.
The transition to "Wintry Hazards"
Most people get the 10-day forecast wrong because they only look at the little sun or cloud icons. You've gotta look at the dew points and the night temperatures. Toward the end of this 10-day window—think Sunday, January 25, and Monday, January 26—the low temperatures are dropping to 34°F or 35°F.
There is a legitimate chance of seeing a "frozen mix" or even some light snow showers as that colder air finally wins the battle against the Atlantic moisture. It’s not going to be a blizzard, but for the school run or the commute down the M27, it’s enough to make things greasy.
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Breaking down the daily vibe
- The Rain Phase (Jan 16 - Jan 20): Daily highs of 50°F. Humidity is through the roof (90%+). Basically, your hair is going to be frizzy and your shoes will be wet.
- The Cloudy Lull (Jan 21 - Jan 22): Temperatures start falling. Highs of 47°F. The rain eases off a bit, but don't expect to see much blue sky.
- The Cold Snap (Jan 24 - Jan 26): This is when it gets "real." Highs of 45°F and lows hitting 34°F. This is when the chance of snow (around 10-25%) starts creeping into the data.
Expert takeaway: Don't pack the heavy coat away yet
A lot of people see a 50°F day in January and think winter is over. It's not. The Met Office and other tracking data suggest that while we’re in a mild "changeable" period now, the end of January and early February are leaning toward much colder, more unsettled conditions.
If you’re planning travel, keep an eye on the fog. With the high humidity and cooling temps, "locally freezing fog" is the big risk for morning drivers over the next week. It’s the kind of weather that looks fine from your window but turns the roads into a skating rink.
Basically, keep the umbrella handy for the next four days, then swap it for the heavy-duty gloves by next Sunday.
Next Steps for You:
Check your car's tire pressure and anti-freeze levels this weekend. As the temperature drops toward 34°F by the end of the 10-day window, those small maintenance tasks prevent major headaches on the A33.