Reading Forecasts and Tides Before a Day Out

A forecast is a statement about likelihood, not a promise. Reading it that way makes for better days and fewer soaked picnics.

What a forecast is

Weather forecasting is the application of science and technology to predict the state of the atmosphere for a given place and time. The important word is predict. Forecasts are generally more dependable for tomorrow than for next weekend, and more dependable for broad patterns than for the exact hour a shower crosses one particular bay.

Read more than the icon

A single sun or cloud symbol hides most of what you need. Look instead for:

• The hourly breakdown. A day shown as "showers" may be dry until mid-afternoon.
• Wind speed and direction. Wind decides whether a beach is pleasant, whether a ridge walk is comfortable and whether the ferry is rough.
• Chance of rain. This is a probability for the area, not a share of the day that will be wet.
• Warnings. National weather services publish warnings for severe conditions. These outrank any app's summary.

Use the source closest to the place

Many phone weather apps repackage data from elsewhere. For a specific coast or mountain area, the national or regional weather service usually publishes more detail, including marine and mountain forecasts written for exactly those conditions. Checking two sources and noticing where they disagree is a quick way to see how uncertain the day is.

Tides, briefly

Tides are the rise and fall of sea levels caused by the combined gravitational effects of the Moon and the Sun together with the rotation of the Earth. For a visitor the practical consequences are simple:

• Some beaches, rock pools and coastal paths are reachable only around low tide.
• A walk that is easy on the way out can be cut off on the way back.
• Estuaries and boat ramps may be mud at one time of day and deep water at another.

Tide times are published in tables for particular locations. Use the table for the nearest listed place, read the date carefully and allow a margin. If local signs or locals say a route is tidal, believe them.

Build a plan that bends

The easiest way to enjoy an uncertain forecast is to plan two versions of the day. Put the weather-dependent thing, such as the walk, the beach or the lookout, in the window that looks best, and keep an indoor alternative nearby: a gallery, a market hall, a long lunch. Decide in advance what would make you switch, so that it is a calm choice rather than an argument in the car.

What to pack regardless

• A light waterproof layer for each person.
• Sun protection, even on a cloudy day.
• Water and something to eat.
• Dry socks in the car. They improve almost any afternoon.

Check again in the morning

Forecasts are updated through the day. The version you read on Thursday is not the one to rely on at breakfast on Saturday. A two-minute look before you leave is the cheapest planning you will do all weekend.

Written by Ingrid Tolliver · last checked 2026-11-12