Portsmouth This Weekend: Weekend Forecast and What to Do

A weekend guide to Portsmouth: 75°F, rain on the books, and local picks that fit the forecast.

Photo: Wikipedia · Portsmouth, New Hampshire

If you're deciding on Portsmouth for 2026-08-22 – 2026-08-23, start with the numbers, then the plan.

Should you plan around Portsmouth's forecast this weekend?

Portsmouth, New Hampshire

Weekend air in Portsmouth sits near 75°F / 63°F, plus a workable rain total around 0.28 in — enough to decide whether the trip is on.

What matters isn’t whether Portsmouth is famous — it’s whether 2026-08-22 – 2026-08-23 supports the outdoor time you want (warm shore air and lighter rain).

If the numbers still look good by Friday, lock the plan around 75°F — not a vague “nice weather somewhere.”

Things to do

Water Country Water Park4.1Huge, kid-friendly aquatic playground with themed pools, an adventure river, dining & slides galore. Prescott Park4.7Waterfront municipal park with flower gardens, fountains, walkways & summer performances. Albacore Park4.7Museum offering tours of the decommissioned Albacore submarine as well as historical exhibits.

What to pack

What to pack1

Rain is in the forecast — a compact shell or umbrella will save the day.

Packing checklist8

Closed-toe walking shoes — Better for cool temps and city miles
Compact umbrella — Showers are likely in the forecast
Light jacket or cardigan — Evenings and air-conditioned spaces
Rain jacket / shell — Stay dry without overheating
Sandals / flip-flops — Easy footwear for heat and water edges
Shorts / breathable bottoms — Stay cool when highs push into the 80s+
Swimsuit — Pools, beaches, and hotel spas
Waterproof shoes — Wet sidewalks and puddles

Bottom line

Portsmouth this weekend: treat 75°F as the planning anchor, then build the itinerary around what you actually want to do.

Keep planning

Updated August 18, 2026. Not a substitute for local advisories.