Research Portal

Compare beaches, filter by reporter cohort and quality grade, and export the underlying dataset. Manage your research group from your account.

Cohort
Quality
CSVGeoJSONJSON

Cite This Data

Tarline Community & Research Network (2026). Tarline beach tar observations [Data set]. tarline.org

Haskell's BeachCarpinteria State Beach
Swell ft
Wind kt

Swell Direction × Tar

Loading swell/tar correlation…

Surf Model Validation

Trailing 30-day mean absolute error between Tarline's Tier 2 (period-banded window model) surf height and CDIP MOP's own breaker-transformed height, per Santa Barbara beach — the acceptance target (research doc §8) is MAE ≤ 1ft for 80% of spot-days. "Observed days" counts days with at least one user-reported wave-size quick-tap feeding the bias loop.

Beach MAE (ft) Sample days Observed days
Mesa Lane Beach 2.2 45 0
Ellwood Beach 2.2 45 0
Arroyo Burro Beach County Park 2.1 45 0
Carpinteria State Beach 2.1 45 0
Rincon Point 2.1 45 0
Butterfly Beach 2.0 45 0
Haskell's Beach 2.0 45 0
Coal Oil Point 1.9 45 0
El Capitan State Beach 1.8 45 0
Refugio State Beach 1.8 45 0
Hammonds Beach 1.7 45 0
Gaviota State Beach 1.7 45 0
Jalama Beach 1.7 45 0
More Mesa Beach 1.6 45 0
Summerland Beach 1.6 45 0
Sands Beach 1.4 45 0
Leadbetter Beach 1.3 45 0
Campus Point 1.3 45 0
East Beach 1.2 45 0
Goleta Beach 1.2 45 0
West Beach 1.1 45 0

Context Layers

1
Known natural seep fields
458
Active oil wells (approx.)
4
Offshore platforms (approx.)

Static display-only counts for v1 — live seeps/wells/platforms feeds land in v2.

Incident Archive

Export CSV ↓
Nov 19, 2025 Cal Spill Watch Dunsmuir Historical Oil – Final Update #29 Source ↗
Aug 13, 2025 Cal Spill Watch Dunsmuir Historical Oil – Update #28 Source ↗
Jul 9, 2025 Cal Spill Watch Dunsmuir Historical Oil – Update #27 Source ↗
Apr 22, 2025 Cal Spill Watch Dunsmuir Historical Oil – Update #26 Source ↗
Nov 8, 2024 Cal Spill Watch Dunsmuir Historical Oil – Update #25 Source ↗
Nov 1, 2024 Cal Spill Watch Dunsmuir Historical Oil – Update #24 Source ↗
Oct 25, 2024 Cal Spill Watch Dunsmuir Historical Oil – Update #23 Source ↗
Oct 18, 2024 Cal Spill Watch Dunsmuir Historical Oil – Update #22 Source ↗
Oct 11, 2024 Cal Spill Watch Dunsmuir Historical Oil – Update #21 Source ↗
Oct 5, 2024 Cal Spill Watch Dunsmuir Historical Oil – Update #20 Source ↗

Showing the 10 most recent of 2033 — full history via CSV export above.