Waterways / San Juan Islands
San Juan Islands
Island archipelago north of Puget Sound — current, fog, orcas, and peak summer moorage competition.
Peak season: May–September
Seasonality now (month 10): 58/100
- Yards index
- 0
- Marina density
- low
- Slip index
- 1.2
- Verified
- 0%
Catalog / demo seed counts — not live founding density. Find them online ≠ founding.
Character
- Salinity: salt
- Sea state: Current rips; fog; otherwise moderate seas
- Seasons: Summer peak
Cast-off window
Best months: 6, 7, 8, 9 · Shoulder: 5, 10
- Fog without radar/AIS
- Spring tide rips
- Gale in Strait
Access
- Limited ramps; mostly wet-moored staging from Anacortes
- Trailer: Low (destination cruising)
- Slip wait: Moorage books out peak season
Safety patterns
Calm prep — then cast off. Stay in when the window is thin; there will be another day.
- Cold water: high
- Thunderstorms: Less thunder; more wind/fog
- Traffic: high Jul–Aug
- Fog: frequent
Quality Boat Day tips
- Shoulder May/Sep for moorage
- Current tables gospel
- Cold water always
Relative cost indices
- Slip
- 1.2
- Fuel
- 1.15
- Yard labor
- 1.15
Primary use cases
- island cruising
- whale watching (legal distances)
- anchoring
- sail voyaging
Common boat types
- Trawler
- Sailboat
- Downeast
- Express Cruiser
- Center Console
Registration & education
Practical pointers — confirm on the agency site before you renew or cross state lines.
WA education; orca regs.
- Canadian border adjacent
- Strong currents
- Whale buffer rules
Find them online · this waterway
Opens on their site · ≠ founding
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Island archipelago north of Puget Sound — current, fog, orcas, and peak summer moorage competition.
Peak season
May–September
Character
- Salinity: salt
- Typical sea state: Current rips; fog; otherwise moderate seas
- Seasons: Summer peak
Cast-off window
- Best months: 6, 7, 8, 9
- Shoulder: 5, 10
Hard no-go patterns
- Fog without radar/AIS
- Spring tide rips
- Gale in Strait
Access
- Ramps: Limited ramps; mostly wet-moored staging from Anacortes
- Marina density: low
- Trailer friendliness: Low (destination cruising)
- Typical slip wait: Moorage books out peak season
Regulations
WA education; orca regs.
Local quirks
- Canadian border adjacent
- Strong currents
- Whale buffer rules
Rules vary by state. Boat Day does not provide legal advice — verify with state agencies.
Safety pointers
See /safety and weather go/no-go.
- Cold water risk: high
- Thunderstorms: Less thunder; more wind/fog
- Traffic: high Jul–Aug
- Fog: frequent
Costs (relative index, demo)
| Slip | Fuel | Yard labor |
|---|---|---|
| 1.2 | 1.15 | 1.15 |
Primary use cases
island cruising, whale watching (legal distances), anchoring, sail voyaging
Common boat types
- Trawler
- Sailboat
- Downeast
- Express Cruiser
- Center Console
Quality Boat Day tips
- Shoulder May/Sep for moorage
- Current tables gospel
- Cold water always
Moat alignment
Proprietary waterway intelligence (boat-day-waterway-v1) for Go Today seasonality, find-your-boat filters, and supplier cold-start — not doorway SEO.
Cast off
Continue — from this waterway
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