Photography, tides and astronomy · Calculator Without the guesswork.

Best Fishing Times Calculator

Load NOAA high/low predictions for a real station and build transparent trip-planning windows around selected turning points. Inputs stay in your browser.

Reference toolTide Window Calculator For FishingLoad NOAA high/low predictions for a real station and build transparent trip-planning windows around selected turning points. Inputs stay in your browser.

Reference calculation

Enter your details.

Station and date go directly to NOAA CO-OPS; CalcSpan does not receive or store them. Optional site analytics loads only after consent and measures broad use, not calculator inputs or result text.

Prediction date

Sun, Aug 30, 2026

NOAA tide-prediction station Use the nearest representative NOAA tide-prediction station; the station ID and date are requested directly from NOAA.

Turning points to plan around

Planning window on each side (hours) A personal trip-planning offset, not a fish-activity prediction.

Height units

Plain-date semantics · start date is not counted unless the result explicitly says inclusive.

Your result

Load official NOAA high/low tide predictions

CalcSpan requests high/low predictions for the selected station and date directly from NOAA CO-OPS. No manual high-tide guess is used.

Why this result

Prediction dateAug 30, 2026

NOAA station ID9414290

Turning pointsHigh tides

User planning offset±1.5 hoursNot a fish-activity model

Height unitsFeet

NOAA prediction statusLoaded after Calculate span

Calculate to load the current reference data before saving.

Read before relying

Context matters.

Choose a NOAA tide-prediction station that represents the exact water body. A nearby station across an inlet, river reach or barrier can have different timing and range.
The station ID and date are sent directly to NOAA when you calculate; CalcSpan does not receive or store them.

Rule set 2.0.0

Sources & scope

Source & calculation QA reviewed

The calculation guide and this source trail show what the result means, where the rule came from and when it was last reviewed. This is source-and-calculation QA, not a claim of medical, legal, tax or other professional review; time-sensitive decisions still belong with the linked authority.

NOAA CO-OPS · SRC-NOAA-TIDES-001Tides & CurrentsSource retrieved 2026-08-19 NOAA CO-OPS · SRC-NOAA-TIDE-API-001Data Retrieval API — Tide PredictionsSource retrieved 2026-08-20 NOAA CO-OPS · SRC-NOAA-TIDE-GUIDE-001Understanding NOAA Tide Predictions — User Guide v4Source retrieved 2026-08-22

JurisdictionUnited States coastal waters — NOAA CO-OPS station predictions; planning only, not navigation or fish-activity forecasting

Last reviewed2026-08-22

Next review due2027-02-22

Review scopeCalcSpan source & calculation QA

PrivacyInputs stay local · coarse usage analytics only after consent

How this calculation works

A visible path from input to answer.

Load NOAA high/low predictions for a real station and build transparent trip-planning windows around selected turning points. The page keeps the calculation scope and its limits beside the result so the output can be checked, copied or revisited.

Calculation flow

Read the record. The calculator uses Prediction date, NOAA tide-prediction station, Turning points to plan around, Planning window on each side (hours) and Height units supplied in the form.
Apply the scope. It applies the United States coastal waters — NOAA CO-OPS station predictions; planning only, not navigation or fish-activity forecasting reference and the explicit date, unit and counting conventions shown in the result.
Expose the checkpoints. Intermediate rows, warnings and timeline events stay visible; the emphasized row identifies the primary checkpoint when one exists.

Illustrative default example Load official NOAA high/low tide predictions

CalcSpan requests high/low predictions for the selected station and date directly from NOAA CO-OPS. No manual high-tide guess is used.

NOAA prediction statusLoaded after Calculate span

Defaults are an illustration only. Replace them with the record that applies to your situation.

Assumptions and scope

Calculation purpose: Load NOAA high/low predictions for a real station and build transparent trip-planning windows around selected turning points. This is a general planning reference; local conditions, product instructions or personal records can override the estimate.

Boundary behavior

Calendar inputs use plain year-month-day semantics. Leap days, month ends, date-pair order and unsupported dates are checked before the result is shown.

Rule trail

Rule set 2.0.0 · Last reviewed 2026-08-22 · Next review due 2027-02-22. The source panel below contains the linked evidence.

Questions answered

What to know before using the result.

Where do the tide times come from?

CalcSpan requests high/low predictions for the selected seven-digit station and date directly from NOAA CO-OPS using station local time and the MLLW datum.

Does the planning window predict when fish will bite?

No. It is only the number of hours you chose around each tide turning point. Species, current phase, water temperature, light, weather, structure and local experience determine actual fishing conditions.

Can I use this result for navigation?

No. NOAA tide predictions and CalcSpan planning windows are not certified navigation products. Check current observations, currents, marine forecasts, charts and local hazards.