Tateyama Boso Peninsula fishing forecast
Tateyama Boso Peninsula is a saltwater fishing spot in Kanto Pacific, Japan. Anglers here target Pacific Bluefin Tuna, Atlantic Bonito, Yellowtail Amberjack. The most productive months are typically May, June, July, August, September.
Today’s verdict
Ranks #283 of 437 spots FishRadar scored worldwide today
In line with this spot’s 7-day average
Score confidence ±4 points, from 8 live signals
The statistical model disagrees with the physics model here today — treat this score with extra caution.
Current conditions
| Sea surface temp | 27.2 °C |
|---|---|
| Wind | 26 km/h from SSW |
| Wave height | 1.9 m at 7 s |
| Current | 0.18 m/s toward E |
| Pressure | 1007 hPa |
| Depth | 52 m |
| Cloud cover | 25% |
| Chlorophyll | 0.28 mg/m³ |
| Salinity | 33.1 PSU |
| Mixed-layer depth | 10 m |
| UV index | 7 |
| Wind sea | 0.4 m at 2 s |
| Ground swell | 1.7 m at 7 s from SSE |
| Current shear (surface vs 50 m) | 0.18 → 0.00 m/s |
The water here is 3.8 °C warmer than the September average of 23.4 °C. Warmer-than-normal water pushes cool-water species deeper and brings warm-water species in earlier than the calendar suggests. The water is mixed to about 26.7 m, with the thermocline below that.
Updated 1 h ago.
What the score means at Tateyama Boso Peninsula
Tateyama Boso Peninsula currently scores 64 out of 100 (Good). Water temperature is 27.2 °C. 8 forecast signals are active in this score.
- Water temperature +24.0
- how close the water is to this species mix’s comfort band
- Current +18.0
- moving water concentrates bait
- Chlorophyll +16.8
- plankton density — the base of the food chain
- Waves +6.6
- swell energy stirring the water column
- Wind +4.1
- surface chop, oxygen and bait drift
- Pre-storm bite +3.5
- the classic feed before heavy weather
What’s biting now
The model expects today: pacific-bluefin-tuna, yellowtail-amberjack, thread-sail-filefish, japanese-spanish-mackerel, japanese-seabass, japanese-flathead, swordfish, silver-pomfret
Bite windows
Best months for Tateyama Boso Peninsula:
Score history at this spot
30 days tracked at this exact location
Best recent day: 2026-08-17, 83/100
13 day(s) at 70+ in the tracked period
19 points below the same day last week
About this spot
Open coastal saltwater — conditions and safety depend heavily on the live wind, wave, and tide forecast, so check them before you head out.
Approximate bottom depth: 52 m
Access & shore
Fishable from shore · offshore-only
What you can catch
-
Thunnus orientalis
-
Sarda sarda
-
Seriola lalandi
Best months by species at Tateyama Boso Peninsula
| Pacific Bluefin TunaThunnus orientalis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Atlantic BonitoSarda sarda | ||||||||||||
| Yellowtail AmberjackSeriola lalandi |
Typical months; local seasons and closures apply.
Local regulations
| Species | Bag limit | Min size | Open season |
|---|---|---|---|
| Pacific Bluefin Tuna太平洋広域漁業調整委員会指示第49号（令和7年11月4日一部改正第52号、令和8年2月17日一部改正第54号）／日本海・九州西第79号／瀬戸内海第48号 | — | — | — |
| SMALL FISH (UNDER 30 kg) MAY NOT BE TAKEN AT ALL — the Fisheries Agency states 「小型魚（30kg未満）については、キャッチ＆リリースを前提とした場合であっても遊漁による採捕は禁止の対象となります」, i.e. even targeting them intending to release is prohibited. Large fish (30 kg and over) may be taken only during an open period. From April 2026 the bag limit is ONE large fish per person per period, the periods being Apr–May, Jun–Jul, Aug–Sep, Oct–Nov, Dec–Jan and Feb–Mar. A one-off annual notification (届出) is mandatory before you fish for bluefin, and every large fish taken must be reported with its tail-fork length and weight. THE FISHERY CLOSES WITHOUT WARNING: when the period tonnage is used up the wide-area fisheries adjustment commission publishes a prohibition period — in 2026 that happened 5–30 April, 24–31 May, 3–30 June and 3–31 July — and from July 2026 a closure takes effect the DAY AFTER it is published. Rules apply identically to boat, charter and shore (breakwater) fishing. If you have no scale and the fish might be under 30 kg, release it; landing an under-30 kg fish when the weight was unknown is still a violation. Check the JFA page on the day you fish. | |||
Licensing:
- saltwater-recreational — residents No general national licence for shore-based recreational sea fishing. What binds you is the prefectural fisheries adjustment rule (都道府県漁業調整規則): permitted gear and methods, prohibited areas, closed periods, per-species size limits and restrictions on fishing under lights are all set there. Do not enter posted commercial fishing-rights areas (漁業権). Recreational bluefin tuna additionally requires a national notification — see the species rule., non-residents Same rules apply. Tourists fishing from a charter boat fish under the operator's arrangements, but the prefectural rules still bind the angler. The Fisheries Agency publishes a leaflet for foreign recreational fishers.
- freshwater-recreational — residents Inland fishing requires a "yugyoken" (遊漁券) issued by the local fisheries cooperative for the specific river or lake, sold per-day or per-season at tackle shops and convenience stores near the water., non-residents Same yugyoken requirement applies to visitors.
FishRadar regulations are summaries for informational purposes only. Japanese recreational fishing rules are set at the prefectural level (都道府県漁業調整規則) and vary between neighbouring prefectures. Always verify with the prefecture and the local fisheries cooperative (漁業協同組合) before fishing, and never enter posted commercial fishing-rights zones. Bluefin tuna rules change during the season without notice — check the Fisheries Agency page on the day you fish.
Check Tateyama Boso Peninsula before you go
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Nearby spots
Explore 10 more fishing spots within 446 km of Tateyama Boso Peninsula.
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Sagami Bay Kanagawa
Suruga Bay Japan
Suruga Bay
Oarai Pacific Ibaraki
Toyama Bay
Sea of Japan Niigata
Lake Biwa Japan
Osaka Bay Japan
Frequently asked questions
What fish can you catch at Tateyama Boso Peninsula?
Anglers at Tateyama Boso Peninsula target Pacific Bluefin Tuna, Atlantic Bonito and Yellowtail Amberjack.
When is the best time to fish Tateyama Boso Peninsula?
The most productive months at Tateyama Boso Peninsula are typically May, June, July, August, September.
What is the fishing forecast for Tateyama Boso Peninsula right now?
Tateyama Boso Peninsula currently scores 64 out of 100, based on live ocean and weather conditions — see the full breakdown on this page.
Can you fish Tateyama Boso Peninsula from shore?
Yes — Tateyama Boso Peninsula is fishable from shore (offshore-only).
Is the thermocline set up at Tateyama Boso Peninsula right now?
Not strongly right now — the water column is fairly mixed, so fish are less depth-locked.
How deep is the water at Tateyama Boso Peninsula?
The scored point sits over roughly 52 m of water. Depth shapes which species hold here and how the thermocline forms.
Fishing guides for this spot
- How to Catch Atlantic Bonito: Chasing the Autumn SpeedstersHow to Catch Yellowtail Kingfish: Taming the Brown BomberHow to Read Tides for Fishing
Forecasts, not guarantees — check local rules before you fish.