SeaAj
Seven sea activities, one verdict for each
The sea that suits an angler on the rocks may not suit a kayak or a swimmer. Pick your activity and read the sea for it.
Shore & rocks
Sea on the rocks, sinker, lure, best times
🚤Boat & kayak fishing
Sea for a small boat, drift, wind getting up, best times
🤿Spearfishing & freediving
Visibility, surge, slack water, water temperature
🏖️Beach & swimming
Rip currents, flags, sun, water temperature
🏄Surfing
Swell height, period and direction, wind
⛵Boat trip
Sea for a small boat, wind getting up, back before dark
🛶Kayak & paddle board
Wind for the way back, drift, choppy water
What is inside
The sea in words
Calm, moderate, rough or dangerous from wave height and period, wind and gusts, and when it turns worse. In a dangerous sea you get no reassuring score.
When should I go?
A daily and monthly index with the best hours and why: light, tide, moon, pressure and wind. Forecast confidence shows whether three weather models agree.
A sea map
Suggested public places along many coasts, your secret spots that nobody else sees, satellite sea temperature and chlorophyll, and depth on European coasts.
Fish guide
75 species: how to catch them, season, baits, dangerous and look-alike species, and the legal minimum size with its official source where we have one.
Catch log
Log catches with a photo and the conditions, and discover your best times and spots. Works offline and syncs later.
Safety tools
Share your outing with a link your family follows without an app, a return point and drift alarm, and alerts when the sea gets worse.
Popular species
How to catch each species, in which months, with which bait, and the legal size where we have verified it.
- Flathead grey mulletMugil cephalus
- European pilchardSardina pilchardus
- Atlantic mackerelScomber scombrus
- Atlantic bluefin tunaThunnus thynnus
- MeagreArgyrosomus regius
- BogueBoops boops
- European congerConger conger
- Common dentexDentex dentex
- European seabassDicentrarchus labrax
- White seabreamDiplodus sargus
- Common two-banded seabreamDiplodus vulgaris
- Dusky grouperEpinephelus marginatus
Questions
Is SeaAj free?
Yes. It is free, has no ads and does not sell your data.
Which activities does it cover?
Fishing from the shore and from a boat, spearfishing and freediving, swimming, surfing, boat trips and paddling (kayak and paddle board).
How reliable is the forecast?
It is an estimate from weather and sea models, not a guarantee. The app shows how far three models agree, and never gives a reassuring number for a dangerous sea. Always look at the sea yourself and wear a life jacket.
Does it work without a connection?
The catch log and the return point work offline and sync later. Without a connection the app shows the last saved conditions, marked as such.
Check the sea before every outing
Free, with no ads, and in 10 languages.
SeaAj is for Android for now; an iPhone version is not out yet.
These are estimates, not guarantees. Always look at the sea yourself before going out, do not go alone and wear a life jacket.