Not enough data yet. Log a session to help build the accuracy score.
This guide was generated from conditions data. Know this spot? Submit your own tips below.
Ichinomiya, the host venue of Olympic surfing in 2021, is a high-energy beach break on Chiba Prefecture's Pacific coast. Coastal jetties structure the sandbars into defined banks, producing steep A-frame peaks that offer fast drops and workable walls. The beach faces east directly into the Pacific, making it one of the most consistent swell magnets near Tokyo. The Japanese surf community here is dedicated and the infrastructure well-developed, with surf shops, shapers, and cafes concentrated along the coastal road.
Summer typhoon season (July-October) delivers the most powerful groundswells, while the winter months (November-March) provide consistent short-period easterly wind swell. The wave works on 2-6ft of east to south-east swell. Westerly offshore winds are required to clean the frequently choppy surface, most reliable in the early mornings. Typhoon swell events can produce waves well overhead with serious power.
The jetties create reference points and predictable rip channels for easy paddle-outs. The best banks form on the south side of each jetty where sand accumulates. Position yourself alongside a jetty in the rip channel, then move onto the adjacent sandbar when sets approach. The peaks shift with sand movement, so observe the breaking pattern for a few minutes before committing to a position.
The jetties are concrete and hard. Getting swept into them on bigger swells is dangerous. Rip currents run alongside the structures. On major typhoon swells, the beach break produces powerful, hollow shorebreak that breaks in shallow water. The crowd is dense and boards fly in heavy wipeouts. Jellyfish appear in late summer. The strong offshore rips during typhoon events can pull surfers significantly offshore.
Multiple paid car parks line the coastal road behind the beach. Facilities include showers, toilets, and changing rooms. The beach is flat and immediately accessible from the car parks. Surf shops offer rental and storage. Train access from Tokyo (90 minutes from Shinjuku) makes it accessible for day trips.
Ichinomiya is extremely crowded, particularly on weekends when the Tokyo surf community drives east en masse. The Olympic legacy has increased awareness and numbers further. Weekday mornings are significantly quieter. The Japanese surf community is polite but the sheer density of bodies in the water makes catching waves challenging.
The banks shift constantly, so a spot that was working yesterday might be flat today. Local knowledge is valuable; the surf shops have real-time intel on which jetty section is producing the best banks. Tuesday and Wednesday mornings offer the emptiest line-ups. The trains run early enough for dawn patrol if you stay in Chiba. A standard performance shortboard handles most conditions. Bring a 3/2mm wetsuit for winter and a springsuit for the warmer months.
No recent check-ins. Be the first to report.
Record your session, conditions and gear.
Based on historical weekly averages
Combining historical conditions with school holiday crowd pressure to find the sweet spot.
How busy each week is based on school holiday overlap from feeder markets.
The timing score combines two signals: historical conditions quality (how good the skiing or surfing typically is in a given week, based on 5 years of weather data) and crowd pressure (how many of this destination's feeder markets have school holidays that week).
Crowd pressure is weighted by each feeder country's share of visitors. If 40% of a resort's visitors come from France and France is on holiday, that contributes 0.40 to the crowd pressure score. Crowds can reduce the timing score by up to 35%, ensuring conditions still matter most.
Scores: 5 = great conditions with low crowds (the sweet spot). 4 = great conditions with moderate crowds, or good conditions with low crowds. 3 = average. 2 = below average conditions or very crowded. 1 = poor conditions or peak holiday chaos.
Last 28 days of logged conditions.
Sign up to save favourite spots and get surf alerts
Create free accountCreate a free profile and let employers in Ichinomiya find you.
Create Profile →Current conditions refresh every 3 hours when the cron runs. Hourly data updates every 30 minutes. The 7-day forecast, luck factor, and packing notes are all pre-computed at the same time.
We compare the 7-day forecast to the last 5 years of marine data for the same week at Ichinomiya. The delta tells you whether conditions are shaping up better, worse, or about the same as a typical mid-June.
We score each day of the 7-day forecast using the same algorithm as the leaderboard, and highlight the highest scorer.
Open-Meteo's Marine API (swell height, period, water temperature) and Weather API (wind and conditions).
Honestly, no. Every break has tide windows, swell directions and reef contours that a global model cannot see. Treat the score as a starting point, then check a local cam.
The best week for surf at Ichinomiya is the week of 2 November (score 3/5) with low crowds.
Flat as a lake. Save your energy for another day. Short-period wind swell: expect weak, crumbly faces. Onshore chop spoiling the lineup. Best conditions early morning before the sea breeze arrives. Not enough swell to get this spot firing properly.
Heads up: jellyfish: peak season.
Indicators derived from forecast data, not official warnings. Always check local lifeguard or official advice.
Moderate water clarity: ~7m visibility
Daily scores over the last 12 months at Ichinomiya