What is the fishing index based on?

It combines solunar theory — moon phase plus the major and minor feeding windows that track the moon's transit, moonrise and moonset — with local weather factors such as wind, pressure and tide state.

When is the best time to fish at Ha Long Bay?

The strongest bites cluster in the major solunar windows, especially where they overlap dawn or dusk. Check today's hourly activity chart and plan to be on the sand an hour before a major window opens.

How is the surf rating calculated?

Each hour is scored on swell height, period and direction, plus wind speed and its state relative to the coast. For curated spots the score is tuned to the break's optimal swell window; otherwise it reflects general conditions.

Fishing & Surf Forecast — Ha Long Bay

Solunar feeding times, surf ratings and the best hours on the water at Ha Long Bay.

The fishing index blends solunar theory — moon phase plus major and minor feeding windows — with local weather, computed from open data and local astronomy. Surf ratings score open marine-model data against what this coast works best with. Use them to pick your times: they are planning aids, not safety advice.

Today at Ha Long Bay

70Very Good1Very Poor

Best fishing window: 08:46 – 10:46 (Peak 09:46)

Best surf window: 00:00 – 23:00 (1)

General Conditions

This beach has no curated spot profile yet, so scores reflect general marine conditions rather than this break's ideal swell and wind. The numbers stay honest — they simply are not tuned to this specific coast.

Scores use a generic model for this beach: no tuned swell window, wind preference or tide note yet — surf scoring ignores swell direction until the spot is surveyed.

Fishing Forecast — Today

Hourly Fishing Activity

Solunar activity score by hour. Dark bars sit inside major feeding periods; light blue bars mark minor periods.

Major period
Minor period
Dawn & dusk periods

Solunar Feeding Windows

Major periods run around the moon's transit and moonrise/moonset; shorter minor periods flank them. Peaks mark the strongest feeding minutes.

Waxing Gibbous

93% illuminated

Minor02:44 – 03:44Peak 03:14
Major08:46 – 10:46Peak 09:46
Minor15:44 – 16:44Peak 16:14
Major21:08 – 23:08Peak 22:08

Surf Report — Today

Hourly Surf Conditions

Surf score by hour with swell height on the right axis. Hover for swell period, direction and wind. Marine forecast window starts 07:00.

Wind states used in the hourly data:

Glassy
Offshore
Cross-offshore
Cross-shore
Cross-onshore
Onshore
Unknown

Best Times

Today's top surf windows and tomorrow's fishing windows at a glance.

Surf — best windows today

00:00 – 23:001

Fishing — windows tomorrow

Minor03:37 – 04:37
Major09:30 – 11:30
Minor16:18 – 17:18
Major21:52 – 23:52

7-Day Fishing & Surf Outlook

Daily fishing and surf outlook for the week ahead.

Today
70Very Good1Very Poor
Tomorrow
70Very Good0Flat
Sat 26 Sep
80Excellent0Flat
Sun 27 Sep
77Excellent5Very Poor
Mon 28 Sep
70Very Good7Very Poor
Tue 29 Sep
70Very Good6Very Poor
Wed 30 Sep
70Very Good6Very Poor

Methodology & Data Sources

Fishing: solunar + weather computed locally. Surf: Open-Meteo Marine (DWD EWAM/GWAM models). Scores are 0-100 planning indicators — always confirm conditions with official marine forecasts before swimming, fishing or surfing.

Marine data: Open-Meteo.com (CC-BY 4.0)

How the Fishing & Surf Index works

Frequently asked questions

What is the fishing index based on?: It combines solunar theory — moon phase plus the major and minor feeding windows that track the moon's transit, moonrise and moonset — with local weather factors such as wind, pressure and tide state.
When is the best time to fish at Ha Long Bay?: The strongest bites cluster in the major solunar windows, especially where they overlap dawn or dusk. Check today's hourly activity chart and plan to be on the sand an hour before a major window opens.
How is the surf rating calculated?: Each hour is scored on swell height, period and direction, plus wind speed and its state relative to the coast. For curated spots the score is tuned to the break's optimal swell window; otherwise it reflects general conditions.