Basco (Batanes) spearfishing forecast — wind, swell, visibility, tides & live cameras

Basco (Batanes) · Philippines
8.2
wave 0.5 m
visibility5m

Dive todaywave, wind and visibility.

Sources: IPMA · NDBC · Copernicushigh confidence · data 07:53

Sources & confidence

Sources
IPMA · NDBC buoys · Copernicus Marine
Method
Model consensus, read per window
Freshness
Re-read every hour, per coast

Compiled by the spearo sea-state engine

The verdict comes from seven water factors and hard safety gates — not ten tabs. Go or stay.

How we score the water

Our own model

Our own forecast engine — not a third-party widget. It weighs these water factors into one go-or-stay verdict for this coast; the 0–10 dial is that verdict, read out as a number.

Swell & wave memory
Height, period and direction of the swell, plus the wake of recent storms — an old storm still stirs the water, and the engine remembers.
Wind & gusts
Speed and gusts, hour by hour — wind speed and an onshore push chop the surface and cut visibility.
Tide phase
Timing and range of the tide, calibrated per coast — big spring tides pull the verdict toward caution.
Water temperature
Sea-surface temperature — sharply cold water vetoes a green verdict.
Currents & outflow
Direction and drift of the current — it pushes you, and it drags turbid coastal water across where you dive.
Rain runoff & air clarity
Rain muddies the water inshore through land runoff, while fog and haze cut visibility at the surface.
Coast shape & exposure
How the coast faces the swell — a sheltered cove keeps the water clean; an exposed, head-on point takes a penalty.

Safety gates

  • Thunderstorm forecast — an instant red, no exceptions.
  • An official warning (MeteoAlarm / IPMA) — yellow, or red for the higher ranks.
  • Missing input data — a would-be green is capped to yellow rather than overstated.
  • Strong disagreement between forecast models — a green day is pulled back to yellow.
  • Night hours — forced red; the window is closed after dark.

It all folds into a single 0–10 score and one verdict: go or stay.

A forecast, not a guarantee — the sea has the last word.

Where to get in, where to hunt

Entry points with coordinates
Seabed relief — promising ground

This verdict — in your pocket. Open the app for the week's window.

Android: the public release is in Google Play review — leave your email and we'll send beta access today.

Android beta — QR code
point your camera
0 m

Surface

Wind, wave and the swell windows — when to go and the best hours.

spearo.app
calmupdated 07:53
Basco (Batanes) — solo, off the rocks
BEST WINDOW
best weather window · solo, stay careful, run the checklist · calm conditions: swell, wind and visibility all normal
wave 0.5 mwind 11 km/hvisibility ~7 mwindow 06:00–21:00
today, best window 06:00–09:00
fish · Visibility 7 m · Water 30.4°C
confidence medium · verdict for the selected day
Whole week — tap a day. is driving swell right now.
Solo risk: carry a float · tell someone your plan and exit time · doubt = don't go. A model-based planner; the call is made on site.
Selected day

Windows, hours
and the day's trends.

The day is picked above, in the hero. Here are that day's windows, the hour-by-hour map and the trends. Tap a window to break down the conditions.

Thursday · today2026-07-23
05:2318:33 · first quarter
00:00 07:00 14:00 18:00 · 0.5 m
Hours (06→20)
06
09
12
15
18
Day's trends
Tide1.38 m
Wave0.92 m
Wind29 km/h
Water31 °C
fish activity: moon underfoot 06:40 · high · moonrise 13:30 · moderate · moon overhead 19:00 · high
Conditions window06:00–09:00
best weather window · solo, stay careful, run the checklist fish
Hs 0.54 mperiod 5.2 swind 11→16surge 0.5viz 5 m
0.54 mup to ~1.08 · 239° at an angle
5.2 sswell moderate
11→16gusts 16 km/h
0.5weak surge
0.17m/s
5 mrecent swell
30.4°C5 mm + hood
▲14:00tide turn near
Atmosphere25 kmlandmarks visible
highmoon underfoot
  • calm conditions: swell, wind and visibility all normal
  • first hours of the flood — fish moving in
confidence mediumtwilight
Open the seafloor map with entry points

Your best window — with you. Forecast in your pocket.

Android: the public release is in Google Play review — leave your email and we'll send beta access today.

Android beta — QR code
point your camera
−10 m

The water column

Visibility and what drives it — post-storm clearing, river plume, temperature and the thermocline.

What it is

A marine instrument,
go / no-go for solo hunting.

spearo.app folds wind, wave, swell period, visibility, tides, water temperature and risk into a single verdict — go to the spot or not. It computes 7 days ahead from open marine models (Open-Meteo, IPMA), with no sign-up and no accounts. Built for solo spearfishing off the rocks, where any mistake costs dearly.

Now live: 1152 spots across 189 stretches of coast — mainland Portugal, Madeira and the Azores.

See all spots
−20 m

The seabed

Relief and bottom type, tides, and the depths of each spot.

On the rock

The forecast is the plan.
The call is on the rock.

The models set the window. Whether you go in is read only at the water: count the sets, watch the surge on the entry. If in doubt, you don't get in.

Entry points

Where to get in
off the rocks.

Scouted entries, coloured by today. The colour is the sea state at the spot, not a guarantee: the wash and a slippery entry you judge on site.

Open the seafloor map
Mahatao boat-harbor reefBasco (Batanes)
borderline
exposed head-on to the swell today
window
tide
shelter
hazard
access

Reef by Mahatao harbor, more sheltered entry, 0–12 m; still strong current offshore. Coords approx.

Google Maps
Valugan / Diura reefBasco (Batanes)
borderline
exposed head-on to the swell today
window
tide
shelter
hazard
access

Boulder reef E of Basco, shore/boat; extreme Luzon-Strait swell and current — calm windows only. Coords approx.

Google Maps

SOLO is the biggest risk: underwater you can black out from lack of oxygen silently and fatally, with no one around. Solo is never truly «safe». Below are the best weather windows; carry a buoy, tell someone your plan and exit time, and any doubt — don't go.

One morning glance — and you know.

Android: the public release is in Google Play review — leave your email and we'll send beta access today.

Android beta — QR code
point your camera

Surfacing

Cameras, map and reference — to hand as you come up.

Live cameras, map & reference
Open the seafloor map →
Reference

What's in season,
what the law says.

In season now
  • talakitok / mamsa / badlon
    trevally / jack · Caranx ignobilis / Caranx melampygus · 0–25 m · target (freedive)
  • lapu-lapu / suno / pugapo
    grouper / coral trout · Epinephelus spp. / Cephalopholis spp. / Plectropomus leopardus · 3–30 m · target (freedive)
    No national minimum size; a draft FAO (s.2019) proposes a length-at-first-maturity (Lm) guide — NOT enacted law. Slow-growing — take large ones sparingly.
  • maya-maya / pargo / bambangon
    red snapper · Lutjanus spp. (L. malabaricus, L. bohar, L. gibbus) · 5–40 m · target (freedive)
    Large reef predators can accumulate ciguatoxin — poisoning risk from certain reefs. Be cautious with big individuals.
  • mangagat / manggagat
    mangrove red snapper · Lutjanus argentimaculatus · 0–15 m · target (freedive)
  • katambak / kanuping / bukawin / silay
    emperor · Lethrinus spp. (L. nebulosus, L. olivaceus, L. harak) · 5–40 m · target (freedive)
  • lipti / lipit / aluman
    sweetlips · Plectorhinchus spp. · 3–30 m · target (freedive)
  • mulmol / loro
    parrotfish · Scarus spp. / Chlorurus spp. · 2–20 m · target (freedive)
    The 'parrotfish is banned / Cebu banned it' rumour is FALSE (fact-checked). A legal target, but ecologically important (grazes reef algae) — take moderately.
  • labahita / indangan / mongho
    surgeonfish / unicornfish · Acanthurus spp. / Naso spp. · 2–20 m · target (freedive)
  • samaral / danggit / kitong / padas
    rabbitfish · Siganus spp. (S. guttatus, S. canaliculatus, S. fuscescens) · 1–15 m · target (freedive)
    Venomous fin spines — handle with care.
  • barakuda / asugon / rumpi / lusod
    barracuda · Sphyraena spp. (S. barracuda, S. jello) · 0–30 m · target (freedive)
    Large reef predators can accumulate ciguatoxin — poisoning risk from certain reefs. Be cautious with big individuals.
  • asilo / adgawon / agba-on / admon
    green jobfish · Aprion virescens · 5–45 m · target (freedive)
  • tanigue / tangigue / tangi
    narrow-barred Spanish mackerel · Scomberomorus commerson · 2–30 m · target (freedive)
    Names: 'tanigue/tangigue' = Spanish mackerel (Scomberomorus). In Visayan 'tangigi' usually = wahoo (Acanthocybium) — don't conflate with the next card.
  • tangigi / guahon
    wahoo · Acanthocybium solandri · 5–40 m · target (freedive)
  • dorado / duradu / pandawan / dulama
    mahi-mahi / dolphinfish · Coryphaena hippurus · 0–30 m · target (freedive)
  • tambakol / bariles
    yellowfin tuna · Thunnus albacares · 10–50 m · target (freedive)
  • bangkulis / lanhu-an / gantaan
    dogtooth tuna · Gymnosarda unicolor · 15–45 m · target (freedive)
  • kugtong / pugapo / lapu-lapu na higante
    giant grouper · Epinephelus lanceolatus · 5–50 m · ⚠️ release
    NOT on the national banned list (verified:false), but large, vulnerable (IUCN) and often MPA-protected — release it, don't take large ones. This is advice, not a ban.
  • mool / taposak / taungan
    bumphead parrotfish · Bolbometopon muricatum · 3–20 m · ⚠️ release
    NOT on the national banned list (verified:false), but IUCN-vulnerable and protected in many MPAs — release it. In FAO 208-1 the name 'mol-mol' means the Napoleon wrasse (mameng), NOT this fish — don't conflate.
Law
  • Mameng / humphead (Napoleon) wrasse (Cheilinus undulatus) — nationally BANNED (FAO 208-1 s.2024, Annex A C.5; CITES App. II). Not a legal target — release it.
  • Whale shark, all sharks and rays, manta/devil ray and sawfish (Rhincodon typus, Mobula/Manta spp., Pristidae) — nationally protected (FAO 193 s.1998; RA 9147 / BFAR protected list). Taking is banned.
  • Sea turtles & dugong (Chelonia mydas et al., Dugong dugon) — protected (RA 9147). Taking/disturbing is prohibited.
  • Giant clam (taklobo, Tridacna spp.) — protected (RA 9147; CITES App. II). Do not take.
  • Seahorse (Hippocampus spp.) — protected (RA 9147; CITES App. II). Do not take.
Safety protocol
  • Sets: watch the wave trains ≥15 min before entering; Hmax ≈ 2×Hs, the wash can run 50 m past the foam line. A lull >10 min with period >12 s = a big set «overdue», do NOT enter; enter right after a full set passes and re-check at minute 30.
  • Exit FIRST: find your exit AND a backup before entering. On a rocky/boulder shore a 0.5 m rise in swell can make the exit impossible — getting pinned/unable to climb out is the main killer.
  • Headland rip: prominent points often have a permanent topographic rip regardless of the model — locate it, enter/exit on the windward side, never swim against it.
  • Cold: wetsuit per the SST chip; the first shiver = a metabolic surge and a drop in breath-hold → get out at the first steady shiver. Cap the session at 45–60 min below 15 °C.
  • Solo discipline: buoy up; tell someone the spot and exit time; conservative breath-hold (never push it in cold/murky/surfy water); visibility <3 m — don't enter.
  • Afternoon wind: on many coasts the wind builds from midday — plan to be out of the water by midday; the chop builds — get out.
  • UV 11:00–15:00 (UVI ≥6): sunscreen and cover up on the surface interval.
  • Solo is a fundamental risk (hypoxic blackout with no buddy). Any doubt = No-go.

FAQ — spearfishing in Basco (Batanes)

Where can I spearfish in Basco (Batanes)?

Basco (Batanes) has rock entry points such as Valugan / Diura reef and Mahatao boat-harbor reef. The far-north Batanes islands, open to the Luzon Strait. Below you'll find each spot (access, shelter and hazards) and today's forecast.

When is the best season in Basco (Batanes)?

West-facing — best in the amihan (Nov–Apr); the habagat SW monsoon (Jun–Oct) brings swell and murk. Typhoon belt Jul–Nov.

How cold is the water in Basco (Batanes)?

Warm year-round, 26–30 °C — 1.5 mm/rashie. The habagat and rain murk the shallows; clearer in the amihan.

Is Basco (Batanes) good for a beginner?

Freedive only (compressor/scuba barred by ordinance in many LGUs); no-take inside MPAs/sanctuaries. Easy shore entry; watch the habagat swell.

Do I need a licence in Basco (Batanes)?

In Basco (Batanes), breath-hold spearfishing is legal nationwide in the Philippines with no licence for personal-consumption fishing (RA 8550/10654), but municipal waters (0–15 km) are governed by the local LGU — it may ban it, restrict it to zones, or ban night hunting. Any take inside an MPA/sanctuary is prohibited (Sec. 101), and compressor/scuba are barred by ordinance in many LGUs. Breath-hold only, with a marker buoy. Do not take mameng (Napoleon wrasse), whale shark, sharks & rays, manta, sawfish, sea turtle, dugong, giant clam or seahorse; release bumphead parrotfish and giant grouper. Check the local Municipal Fisheries Ordinance and see the guide.

Full guide: spearfishing in the Philippines
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