Shiomigawakakou
- Shortboard, Advanced riders
- Best for
- Expert
- Skill Level
- Flat
- Spot Type
- Moderate
- 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 It may be incomplete, outdated, or incorrect.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
Shiomigawakakou is a rivermouth surf spot in Hyuga known for producing hollow, powerful waves over a sandy bottom with rock/reef hazards. It’s a technical, high-performance location where wave quality strongly depends on sandbar formation and the combined alignment of tide, swell, and wind. The spot is oriented around Southeast/E/Northeast swell work, and northwesterly winds are described as the key wind condition for shaping the wave. When NW winds are offshore, the waves are more likely to stay clean and rideable; onshore easterlies are reported to make the surf choppy and more dangerous. Hazards are the main limiter: strong river outflow and currents, submerged boulders, reef/rock areas, and shifting sandbars near the entrance are repeatedly flagged. After heavy rain or typhoon impacts, currents and the underwater structure can change quickly, so conditions can turn on short notice. For timing, typhoon-season swell windows are emphasized, with June to October noted as a strong general period; one provider additionally highlights autumn (September to November) as the best seasonal balance. Overall, the spot is best suited to experienced surfers who can manage currents and navigate rocky/reef environments while reading the tide and sandbar changes.
- Hollow, powerful rivermouth waves
- NW offshore winds improve wave cleanliness
- SE/E/NNE swells are favored
- Hollow, powerful rivermouth waves with high-performance sections when conditions align.
- Best conditions align with NW offshore wind and SE/E/NNE swells.
- Good day length is reported when the spot is on.
- Very technical and setup-dependent; sandbars shift after rain/typhoons.
- Strong currents and heavy rocky/reef hazards at the rivermouth entrance.
- Wind reliability can be low; turbulence near hills may occur.
Wind, water and seasons
Wind
- Direction
- NW
- Offshore directions
- NW
- Wind Range
- 10–20 kts
- Wind Type
- Trade — Sources describe northwesterly/offshore winds as optimal for the rivermouth break.
- Reliability
- low
- Best Months
- June, July, August, September, October
- Shadow Zones
- Surrounding hills can cause turbulence with westerly winds.
Water & beach
- Water Type
- Flat
- Beach
- Sand — Sandy bottom, with rocks/boulders in the rivermouth zone.
- Beach Size
- Small
- Waves
- Medium — Starts working below 1m and can build to 2m+.
- Launch
- Small — Narrow rivermouth entrance between boulders and sandbanks.
- Launch Difficulty
- Difficult — Reported as difficult due to narrow entrance and hazardous conditions; another provider rates access/launch as easy, but notes the waves and hazards remain technical.
Through the year
Weekends can see a dedicated local crowd.
Rainy season occurs in June and July; typhoon season typically August through October.
By sport
What to expect for each.
A technical rivermouth break producing hollow, powerful sections when sandbars are well-formed. Conditions are often sensitive to the exact tide/swell/wind alignment.
- Wave Direction
- Both
- Optimal Swell
- SE, E, NNE
- Optimal Tide
- Mid — Best tide movement is noted, with mid-tide highlighted by providers.
- Shelter
- Exposed — Rivermouth exposure and open coast effects; winds strongly influence chop.
- Wind Effect
- Offshore NW winds groom the waves; easterlies/onshore winds make it choppy and dangerous.
- Bigger Swell
- Holds size well but becomes very heavy and technical with significant swell.
- Wave Quality
- Excellent — Wave quality is described as excellent / regional classic.
- Wave Power
- Powerful — Described as hollow and powerful, with sometimes very heavy/technical conditions on bigger swells.
- Wave Shape
- Hollow — Hollow sections form over sand-and-rock/rivermouth terrain.
- Peel Speed
- Fast — Fast, punchy rides depending on sandbar configuration.
- Ride Length
- Medium — Day length is described as good; typical ride lengths are reported as fast/medium depending on setup.
- Typical Ride Length
- 50–150 m
- Ride Length Details
- Can offer fast, punchy rides with occasional barrel sections depending on sandbar configuration.
Check the forecast before you go
See wind, waves, weather and session windows for Shiomigawakakou in the full forecast view.
Shiomigawakakou wind and wave forecast summary
- Wind
- 2–11 ktsGusts 20 kts
- Direction
- SW225°
- Strongest day
- Sat, Oct 2411 kts
- Windy days
- 0/712 kts or more
- Waves
- 0.6–2.7 m7s period
- Temperature
- 10–29 °C
Over the next 7 days, Shiomigawakakou is forecast for daytime winds of 2–11 kts, peaking around 11 kts on Saturday, October 24 with gusts to 20 kts. The prevailing direction is SW. Waves run 0.6–2.7 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
- rocks
- reef
- submerged boulders
- strong river currents
- rip currents
- river debris after rain
- shifting sandbars near the river entrance
Rescue & support
- Lifeguard
- None — No lifeguards reported at the spot.
- Rescue & Self-Rescue
- No — Rescue availability is reported as no.
- Emergency Info
- Nearest medical facilities are located in Hyuga City center.
- Localism / Vibe
- Moderate — Moderate local focus; riders are asked to respect those already on the peak.
Rules of the spot
Follow standard surfing etiquette. Priority may be given to those already on the peak.
- Watch out for rocks and reef hazards.
- Be extremely cautious of the current pulling you out to sea or toward the rocks.
- Sandbars change frequently after heavy rain or typhoons.
- Respect the local surfers who frequent this specific peak.
Getting there & access
- Nearest City
- Hyuga
- Nearest Town
- Hyuga
- Parking
- Limited parking available near the riverbank or nearby road shoulders.
- Access
- Instant access (< 5min) from the city; accessible by road; located where the Shiomi River meets the sea.
- Cost Level
- Moderate
- Local Language
- Japanese
What's on the beach
- Accommodation
- Nearby town — Guesthouses and hotels are available in the city of Hyuga.
- Food & Drink
- Convenience stores and small restaurants are a short drive away in town.
- Equipment Rental:
- Surf and SUP rental equipment is available via nearby surf shops along access roads (wider region).
- Gear Storage
- Some surf shops offer monthly or daily board storage lockers for traveling riders (wider region).
- Gear Repair
- Local surf shops provide minor board repairs; professional repair services are available in the wider Hyuga Coast area.
No schools or services are listed for this spot yet.
From riders who've been here
Latest reported conditions
Spot questions
Frequently asked questions
When is the best season at Shiomigawakakou?
The best overall months at Shiomigawakakou are June, July, August, September, October.
Which wind directions work at Shiomigawakakou?
Shiomigawakakou works with NW winds. Offshore directions are NW.
What skill level is Shiomigawakakou suitable for?
Shiomigawakakou suits these riding levels: Surfing: Advanced to Expert.