Kuminatu (Katsuura)
- Shortboard, Longboard
- Best for
- Intermediate
- Skill Level
- Chop
- Spot Type
- Busy
- Crowd Level
This spot information is AI-assisted and has not been human verified. It may be incomplete, outdated, or incorrect. Verify safety, access, local rules, and current conditions with official or local sources before riding.
About
Kuminatu (Katsuura) is a sand-bottom beach break that can be either exposed or semi-sheltered depending on the broader swell and wind setup. Sources agree it can be inconsistent, but it still produces workable lefts and rights when the swell direction and offshore wind align. Intermediate surfers are specifically called out as the best fit. Wind and cleanliness are strongly linked: northerly to north-northwesterly winds are described as the best direction because they tend to blow offshore. One dataset cites north-northwest as the best wind direction and also reports a monthly 'blown' percentage around 46%. Another provider characterizes winds as 'thermal' with light offshore conditions in the morning and lists a best window spanning October through December. Surf quality varies, but there are useful practical targets. One source describes the wave working best around 4 ft and being potentially able to handle bigger sizes, while another provider reports an optimal swell height range of about 1.0–2.0 meters and notes peeling, medium-ride-length beach-break waves. Rides are described as typically 30 to 50 meters in standard beach-break conditions. Safety considerations are important here: rip currents are reported (with occasional rip currents depending on swell size), and strong currents are mentioned for the wider Katsuura area. Hazards include tetrapods and nearby pier structures. There are no lifeguards reported, and rescue availability is described as limited in the region; local guidance emphasizes checking conditions before entering and using designated parking areas.
- Cleaner offshore faces with northerly/north-northwesterly winds
- Often used as a fallback when the Pacific coast is too big
- Intermediate-friendly, manageable beach-break rides when conditions are right
- Offshore northerly/north-northwesterly winds tend to produce cleaner faces.
- Works best around the commonly targeted swell/conditions window and can still be usable when other Chiba beaches are too big.
- Sandy bottom and easy-to-access launch (beach setting).
- Low-profile locally used surf fallback option.
- Inconsistent surf conditions reported.
- Rip currents/strong currents can occur.
- No lifeguards reported.
- Conditions may close out on very large swells.
Wind, water and seasons
Wind
- Direction
- N, NNW, NW
- Offshore directions
- N, NNW, NW
- Wind Range
- 10–20 kts
- Wind Type
- Mixed — Provider data conflicts: one source describes northerly/north-northwesterly winds for best conditions, while another labels winds as 'thermal' with light offshore morning winds.
- Reliability
- 46% blown monthly (spot database); medium reliability reported by another provider.
- Gust Factor
- Light gusts — Light gusts reported.
- Best Months
- October
- Shadow Zones
- Bay provides some shelter from strong southerly winds (provider report).
Water & beach
- Water Type
- Chop
- Beach
- Sand — Sand beach.
- Beach Size
- Medium
- Waves
- Small — One provider lists small wave size; another describes medium wave size.
- Chop Level
- Heavy chop — Water type described as 'chop' and shore break described as moderate by one provider.
- Launch
- Medium — Sandy beach access with some concrete embankments and tetrapods nearby.
Through the year
June and July (rainy/tsuyu season) followed by typhoon season from August to October that can bring extreme conditions.
By sport
What to expect for each.
An exposed beach break with inconsistent surf; when conditions line up it offers manageable lefts and rights over a sandy bottom. One source also frames it as a semi-sheltered alternative when other areas in Chiba are overwhelmed by large swells.
- Wave Direction
- Both
- Optimal Swell
- SE, S
- Swell Height
- 1–2 m
- Optimal Tide
- Mid — Optimal tide reported as mid.
- Shelter
- Exposed — Conflicting shelter descriptions: one source calls it exposed, while another describes it as relatively sheltered/semi-sheltered and a shelter fallback when the coast is too big.
- Wind Effect
- Cleanest with northerly/north-northwesterly winds which blow offshore here; best from north-northwest reported.
- Bigger Swell
- Holds up better than exposed beaches during massive typhoon swells but can close out if too large.
- Wave Quality
- Average — Wave quality reported as average; another dataset emphasizes inconsistent surf and best usability around ~4 ft.
- Wave Power
- Moderate — Moderate wave power reported.
- Wave Shape
- Peeling — Peeling wave shape reported; another provider characterizes conditions as exposed/inconsistent with best usability around 4 ft.
- Peel Speed
- Medium — Peeling waves reported with medium peel speed.
- Ride Length
- Medium — Standard beach break rides typically between 30 to 50 meters (provider report).
- Typical Ride Length
- 30–50 m
- Ride Length Details
- Standard beach break rides typically between 30 to 50 meters.
Check the forecast before you go
See wind, waves, weather and session windows for Kuminatu (Katsuura) in the full forecast view.
Kuminatu (Katsuura) wind and wave forecast summary
- Wind
- 4–16 ktsGusts 30 kts
- Direction
- N359°
- Strongest day
- Sun, Oct 2516 kts
- Windy days
- 2/712 kts or more
- Waves
- 0.9–2.1 m7s period
- Temperature
- 13–25 °C
Over the next 7 days, Kuminatu (Katsuura) is forecast for daytime winds of 4–16 kts, peaking around 16 kts on Sunday, October 25 with gusts to 30 kts. The prevailing direction is N. Waves run 0.9–2.1 m with a period of about 7s. Based on the Wavind model, in the spot’s local time.
Other spots in the area
What to know before you launch
Safety, access, restrictions, rescue, and local rules can change. Treat these details as informational and confirm them locally before launching.
Hazards
- Tetrapods
- Rip currents
- Strong currents in the Katsuura area
- Crowds during peak swells
Rescue & support
- Lifeguard
- None — No lifeguard presence reported.
- Rescue & Self-Rescue
- Limited — Spot-level sources report no direct rescue; regional context indicates limited rescue with JCG operations nearby and surf lifesaving clubs during peak summer months.
- Localism / Vibe
- Moderate — Moderate localism reported; also noted as having friction risk with improper parking.
Rules of the spot
Japanese law requires life jackets to be worn at all times while on board (provider report).
- Life jackets required while on board under Japanese law.
- Check conditions before entering.
- Often used as a fallback/shelter spot when the Pacific coast is too big; monitor swell size and offshore wind.
- Park only in designated areas to avoid friction with the local community.
- Be aware of strong currents in the Katsuura area.
Getting there & access
- Nearest City
- Katsuura
- Nearest Town
- Katsuura
- Parking
- Parking is available, and many surfers access the beach in front of the main parking lot (provider report). Another provider notes limited parking near the port and beach access points.
- Local Language
- Japanese
What's on the beach
- Accommodation
- Nearby town — Various guesthouses and ryokans in the Katsuura/Kamogawa area (provider report).
- Equipment Rental:
- Provider reports rental is available (context suggests surfing/SUP gear).
No schools or services are listed for this spot yet.
Off the water
Katsuura-area tourism is centered on coastal culture and ocean recreation, with seafood-focused market culture and coastal viewpoints.
One of Japan's three major morning markets with local seafood and produce.
An underwater observation tower offering views of local marine life without getting wet.
The wider Katsuura coast is the main tourism anchor for the region.
A historic shrine known for its coastal views and traditional architecture.
Scenic trails along the rugged Boso coastline offering panoramic views of the Pacific.
Coastal recreation is the main draw, with beachgoing and water-sports tourism centered on the wider Katsuura area.
A scenic park with walking paths and coastal vistas suitable for families.
From riders who've been here
Latest reported conditions
Spot questions
Frequently asked questions
When is the best season at Kuminatu (Katsuura)?
The best overall months at Kuminatu (Katsuura) are September, October, November. The best wind months are October.
Which wind directions work at Kuminatu (Katsuura)?
Kuminatu (Katsuura) works with N, NNW, NW winds. Offshore directions are N, NNW, NW.
What skill level is Kuminatu (Katsuura) suitable for?
Kuminatu (Katsuura) suits these riding levels: Surfing: Intermediate.