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Shore entry

Harborview Beach

Massachusetts, United States
Open Water suggested2–6 m depthShore entry5mm wetsuit typical

Harborview Beach at a glance

Harborview Beach is a shore dive site in Massachusetts, United States with depths of 1.5–6.1 m (5–20 ft). Typically most favorable Jul–Aug · from 3 years of archive data. Divers commonly see American lobster, Rock crab, and Cunner. Recent reports put the water around 21°C (70°F). Check the latest conditions and entry details before you go.

Marine model · graded 5h ago
0.5 mwaves — under a meter expected

Tap a factor for its source and model point · Forecast 21°C · seasonal avg 21°C

Site hazards: Fishermen casting from the breakwater (entanglement in monofilament); boat traffic entering and leaving Sesuit Harbor just beyond the breakwater; cold water; very shallow at low tide.

Read the full hazards ↓

Dive windows this week

Best: Mon
Mon6:00–21:00
Tue6:00–22:00
Wed6:00–21:00
Thu0:00–22:00
Fri—
Sat—
Sun—

Favorable windowModerate window— no window

First light 4:58 · Sunrise 5:30 · Sunset 20:04

Source: Open-Meteo marine · model point 14 km from site · graded 5h 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.

What Divers Say

Known for: American lobster, Rock crab, Cunner
Best time: Within an hour of high tide, evenings (after the 4 PM parking restriction lifts) make it a popular dusk/night dive; calm southwest winds are ideal.

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. Jan32%5°C1.4 m
  2. Feb25%4°C1.4 m
  3. Mar29%4°C1.4 m
  4. Apr52%7°C1.0 m
  5. May71%12°C0.9 m
  6. Jun84%17°C0.7 m
  7. Jul86%21°C0.6 m
  8. Aug86%20°C0.7 m
  9. Sep80%18°C0.8 m
  10. Oct61%15°C1.1 m
  11. Nov32%11°C1.3 m
  12. Dec33%7°C1.4 m

July and August havetypically 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

  • American lobsterCommonly seen
  • Rock crabCommonly seen
  • CunnerCommonly seen
  • Winter flounderCommonly seen
  • Hermit crabCommonly seen
  • Moon snailOccasionally seen
  • Sea robinOccasionally seen
  • Striped bassSeasonal

Fills & rentals nearby

No dive shops mapped within 25 km. Know one? Add it to the map.

Site details

Harborview Beach, beside the Sesuit Harbor breakwater in Dennis, is an easy, shallow Cape Cod Bay shore dive and a favorite quick dusk or night dive for locals. Navigation is simple - keep the breakwater on your right and pick through the rocks for lobsters, crabs, and other critters. Most of the dive is around 10 ft at high tide with a maximum of about 15-20 ft at the end of the breakwater, making it a great beginner site. Dive within an hour of high tide and watch for fishermen on the rocks and boat traffic in the harbor channel.

shore

Fishermen casting from the breakwater (entanglement in monofilament); boat traffic entering and leaving Sesuit Harbor just beyond the breakwater; cold water; very shallow at low tide.

Reviews

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