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AdvancedShore entry

Fort Constitution / UNH Pier

New Hampshire, United StatesDirections
AOW suggestedShore entry5mm wetsuit typical

Fort Constitution / UNH Pier at a glance

Fort Constitution / UNH Pier is an advanced shore dive site in New Hampshire, United States. Typically most favorable Jul · from 3 years of archive data. Divers commonly see Cunner, Frilled anemone, and Longhorn sculpin. Recent reports put the water around 17°C (63°F). Check the latest conditions and entry details before you go.

Marine model · graded 13h ago
0.3 mwaves — under half a meter expected

Tap a factor for its source and model point · Forecast 17°C · seasonal avg 18°C

Site hazards: Very strong tidal current outside slack, heavy silt, research structures and boat operations, Coast Guard station nearby

Read the full hazards ↓

Dive windows this week

Best: Sat
Fri7:00–19:00
Sat7:00–19:00
Sun7:00–19:00
Mon9:00–19:00
Tue7:00–18:00
Wed10:00–19:00
Thu7:00–19:00

Favorable windowModerate window— no window

First light 5:49 · Sunrise 6:18 · Sunset 19:00 · all windows sit within daylight

Source: Open-Meteo marine · model point 13 km from site · graded 13h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Known for: Cunner, Frilled anemone, Sea star
Best time: High slack tide after an incoming tide

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. Jan45%6°C1.3 m
  2. Feb32%4°C1.3 m
  3. Mar31%4°C1.5 m
  4. Apr59%6°C1.2 m
  5. May68%11°C1.1 m
  6. Jun86%15°C0.8 m
  7. Jul87%17°C0.8 m
  8. Aug85%18°C0.8 m
  9. Sep76%18°C1.1 m
  10. Oct57%14°C1.2 m
  11. Nov51%11°C1.1 m
  12. Dec38%8°C1.3 m

July hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Data updated June 2026

Site details

A muck-and-critter dive beneath and beside the UNH 325-foot marine research pier at Fort Point, New Castle, next to the historic Fort Constitution. Strong Piscataqua River currents make this strictly a slack-tide dive; the silty bottom hides invertebrate life and old artifacts such as antique ceramic pipes. Best done at high slack after an incoming tide with someone who knows the site.

muckshore

Very strong tidal current outside slack, heavy silt, research structures and boat operations, Coast Guard station nearby

Reviews

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