Coastal conditions

Nantucket Harbor

Harbor · Massachusetts · Cape Cod and Islands

Location Snapshot

Nantucket Harbor is a protected island fishery shaped by tidal flats, harbor channels, points, and the exchange with Nantucket Sound. Striped bass are the principal supported target, with bluefish adding a second major migratory opportunity in and around the harbor.

Active coastal or marine alerts

  • Gale Warning

    Severity: Moderate

    Gale Warning issued October 20 at 2:16AM EDT until October 21 at 8:00PM EDT by NWS Boston/Norton MA

    Begins Oct 20, 2026, 2:16 AM · Ends Oct 21, 2026, 8:00 PM

    Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions.

    Official NWS alert

Current Coastal Rating

Poor

Beta

Conditions are poor. Review the details below before heading out.

Should I Go?

Trip conditions only. Target-species activity and seasonal fishery patterns are not yet included.

Do Not Go

Safety gate

An active marine warning affects this destination.

See the active alert cards above for official details.

Evaluates trip conditions using weather, tides, currents, waves, daylight, and active alerts.

Service Status

Degraded

Coastal conditions are partial, stale, or predictions-only.

Why

  • An active marine warning affects this destination.

Current Readings

Updated Oct 20, 2026, 5:55 AM

NOAA Station selected

Source

  • NOAA CO-OPS
  • Nantucket Island station
  • 0.0 mi from destination
Water level
2.9 ft MLLW

Updated 8 min ago

Water temperature
55°F

Updated 8 min ago

Wind
NNE · 11 mph

Updated 8 min ago

Wind gust
18 mph

Updated 8 min ago

Past 7 Days

NOAA Station selected

Water level

Window Oct 13, 2026, 5:55 AM – Oct 20, 2026, 5:55 AM (rolling 168 hours)

Water level over the past 7 days. 1676 observations · from Oct 13, 2026, 6:00 AM · to Oct 20, 2026, 5:48 AM Range 0.9 ft MLLW to 4.8 ft MLLW.

Readings increased over the available period.

1676 observations · from Oct 13, 2026, 6:00 AM · to Oct 20, 2026, 5:48 AM

  • NOAA CO-OPS · Nantucket Island · Station 8449130
  • Station at destination
  • Approximately 0.0 mi from destination
  • Observation type: observed
  • Unit: ft
  • Datum: MLLW

Nearby coastal destinations

  • Great Rip20.6 mi

    Massachusetts · Nantucket Great Rip / Nantucket Shoals approaches · Offshore

    Approximately 20.6 miles away

  • Massachusetts · Cape Cod and Islands · Inlet

    Approximately 26.5 miles away

  • Woods Hole34.1 mi

    Massachusetts · Cape Cod and Islands · Harbor

    Approximately 34.1 miles away

Predicted Tides

Predicted

Rising

Next high tide

Oct 20, 2026, 8:17 AM

In 2 hr 21 min

2.7 ft MLLW

Previous

Low · Oct 20, 2026, 1:42 AM · 0.6 ft MLLW

Following

Low · Oct 20, 2026, 1:49 PM · 1.0 ft MLLW

Tide station at destination

Nantucket Harbor · NOAA 8449130

Predicted Tidal Current

Predicted

Current predicted speed is not available for this interval.

Next: Slack · 8:22 AM · 0.0 knots

Following: Max ebb · 12:21 PM · 1.3 knots

Current prediction station at destination

Nantucket Harbor entrance channel · NOAA ACT1686 · 1.5 mi from destination

NOAA current station

Planning note

These values are tidal-current predictions, not real-time observed currents. They describe conditions near this prediction station rather than the entire surrounding coastal area.

Data coverage

This station provides max-current and slack-water events, but not a continuous current-speed timeline.

Tidal-current timing can differ from high and low tide timing.

Fishery Profile

Fishery Overview

Nantucket Harbor entrances, flats, and Sound-influenced edges

A protected island-harbor fishery focused on Nantucket Harbor entrances, flats, and channels with Nantucket Sound influence outside the harbor mouth.

Fishery type
  • Protected harbor
  • Flats
  • Entrance channel
Fishing modes
  • Shore
  • Wade
  • Inshore boat
Habitat and structure
Protected harbor flats and channels · Harbor entrance channel · Sound-influenced water outside the mouth · Shore access points around the harbor

Static seasonal guidance · Last reviewed Jul 22, 2026

Not a live bite forecast.

Fishery Targets

Striped bass lead the harbor fishery from spring through fall. Bluefish, scup, and flounder fill warm months; false albacore is a late-season Sound/entrance pulse when present.

Species images are AI-generated illustrations for visual reference and may simplify natural variation. Fishery records are based on the cited agency and editorial sources. About fish illustrations

  • Striped bass illustration

    Striped bass

    Primary

    Morone saxatilis

    Currently in a typical seasonal window

    Typical seasonal window: MAY — NOVEMBER

    Harbor edges, flats, and entrance channels.

  • Bluefish illustration

    Bluefish

    Secondary

    Pomatomus saltatrix

    Currently in a typical seasonal window

    Typical seasonal window: JUNE — OCTOBER

  • Scup illustration

    Scup

    Secondary

    Stenotomus chrysops

    Currently in a typical seasonal window

    Typical seasonal window: MAY — OCTOBER

  • Summer flounder illustration

    Summer flounder

    Secondary

    Paralichthys dentatus

    Typical seasonal window: MAY — SEPTEMBER

  • False albacore illustration

    False albacore

    Seasonal

    Euthynnus alletteratus

    Also called Little tunny

    Currently in a typical seasonal window

    Typical seasonal window: AUGUST — OCTOBER

    More Sound/entrance oriented when warm water arrives.

Typical Seasonal Targets

  • Striped bass — MAY — NOVEMBER
  • Bluefish — JUNE — OCTOBER
  • Scup — MAY — OCTOBER
  • Summer flounder — MAY — SEPTEMBER
  • False albacore — AUGUST — OCTOBER

Seasonal presence is general guidance and does not indicate current fish activity.

How to Fish Nantucket Harbor

Common seasonal approaches for this destination.

  • Entrance-channel current casting

    Cast along the harbor entrance channel when tidal exchange concentrates bait.

    Best for

    • Striped bass
    • Bluefish
    • False albacore

    Modes

    • Shore
    • Wade
    • Inshore boat

    Setup

    • Harbor predator setup
  • Harbor flats and edge casting

    Work soft plastics and swimming plugs along flats edges and channel seams inside the harbor.

    Best for

    • Striped bass
    • Bluefish

    Modes

    • Shore
    • Wade
    • Inshore boat

    Setup

    • Harbor predator setup
  • Harbor bottom and structure fishing

    Fish scup and flounder presentations on harbor bottom and edges.

    Best for

    • Scup

    Modes

    • Shore
    • Inshore boat

    Setup

    • Harbor bottom setup

Common Tackle Setups

  • Harbor predator setup

    Medium-light to medium spinning for bass and bluefish in harbor and entrance water.

    Rod
    7–8 ft medium-light to medium spinning rod.
    Reel
    Compact spinning reel.
    Main line
    Light braid.
    Leader
    Fluorocarbon leader.
    Terminal tackle
    Snaps.; Single-hook jigs.
    Presentation
    Match lure weight and retrieve speed to protected harbor water.

    Used for

    • Entrance-channel current casting
    • Harbor flats and edge casting
  • Harbor bottom setup

    Light bottom fishing for scup and flounder.

    Rod
    6–7 ft light to medium spinning rod.
    Reel
    Light spinning reel.
    Main line
    Light braid or mono.
    Leader
    Fluorocarbon leader.
    Terminal tackle
    Small hooks.; Jigs.

    Used for

    • Harbor bottom and structure fishing

Typical October Lures and Flies

Common lure and fly families associated with this month’s techniques.

Lures

  • Minnow-style swimming plug

    Lure
    • Striped bass
    • Bluefish

    Shallow to midwater · Steady, twitch, pause

    Cast across seams and let the plug track with the current

  • Soft-plastic paddle tail

    Lure
    • Striped bass
    • Bluefish

    Shallow, Midwater, Variable · Steady, twitch, jig

    Swim steadily through seams or hop lightly near bottom transitions

  • Soft-plastic sand eel

    Lure
    • Striped bass
    • Bluefish

    Shallow to midwater · Steady, twitch, slow

    Swim or twitch just above the bottom on flats and bar edges

  • Compact casting metal

    Lure
    • Bluefish
    • False albacore

    Shallow to midwater · Fast, steady

    Lead showing fish and keep a fast, even retrieve

  • Soft-plastic jig head

    Lure
    • Scup

    Midwater, Bottom, Variable · Jig, slow, drift

    Keep intermittent bottom contact around structure and soft edges

Flies

  • General baitfish streamer

    Fly
    • Striped bass
    • Bluefish

    Modes

    • Shore
    • Wade
    • Inshore boat

    Shallow to midwater · Steady, twitch, swing

    Strip with short pauses so the fly tracks naturally through seams

General seasonal guidance, not a live recommendation, product endorsement, or guarantee of success.

Access, Safety and Regulations

Access

Use public harbor access, town landings, and lawful wade areas. Respect private docks and marked restricted zones.

Primary hazards

Strong entrance exchange, boat traffic, and changing flats depths are primary hazards. Open-sound seas are not the wave height inside the harbor.

Regulations

Size limits, seasons, and possession rules change. Verify the current official regulations before fishing.

Location and Access

Harbor · Massachusetts

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The map marker represents the cataloged waterbody or monitoring location and may not indicate legal parking or public access. Confirm access through the official information before visiting.

Data Sources

Planning limitation

Coastal conditions can vary over short distances. Predictions and remote observations are planning information, not guarantees of access or safety.