A weather check for the full search
Metal detecting is slow, stop-start outdoor time: walking a grid, sweeping, checking a signal, recovering an item and filling the ground again. A comfortable first hour does not help much if heavy rain, severe cold or darkness arrives before the planned session ends. GoodDayTo therefore scores every forecast hour in your selected 1-hour, 3-hour or 5-hour window and lets the weakest conditions limit the answer.
The first answer stays simple: GO, WAIT or NOT TODAY, the best complete time window and one plain-language line. Open the supporting details when you want to see what helped or hurt the result. The score is deliberately about forecast practicality; it never claims a promising site, likely finds or legal permission.
How the metal-detecting score works
The model rewards daylight, low rain risk, manageable wind and a comfortable apparent temperature. It tolerates more light moisture than a dry-surface activity such as rollerblading, because slightly damp ground does not automatically end a search. It becomes cautious when the selected window contains at least 0.3 mm of forecast precipitation or a rain probability of 55% or more. A total of 1 mm, or an 80% rain probability in any selected hour, caps the complete session at NOT TODAY.
Wind is mostly a comfort and handling issue for this activity, but open fields, exposed shorelines and loose equipment can make gusts tiring. A sustained wind of 28 km/h or gusts of 42 km/h brings a WAIT cap; 38 km/h wind or 55 km/h gusts brings NOT TODAY. These are conservative planning guardrails, not official universal limits, and a wooded site may feel very different from an exposed beach.
Apparent temperature matters over a longer search. A feels-like temperature at or below 0°C, or at or above 30°C, prevents GO. At or below −7°C, or at or above 35°C, the verdict is capped at NOT TODAY. Freezing precipitation, snow, thunderstorms and very strong gusts also trigger the shared safety caps. If any chosen hour is dark, the whole window receives the daylight cap because holes, obstacles and property boundaries are harder to manage safely.
- Whole-session rain
- Apparent temperature
- Wind & gusts
- Daylight
- Freezing precipitation
- Thunderstorm signal
What GO, WAIT and NOT TODAY mean
GO means the complete selected window clears the activity’s weather and daylight rules. You still need a permitted site and a safe recovery plan. WAIT means the weather is usable only with a meaningful caution, or a better window is available. NOT TODAY means at least one strong weather or timing limit applies across the chosen duration.
What the score does not measure
GoodDayTo cannot identify the landowner, grant permission, check protected archaeology, read a site-specific detecting policy or decide who owns a find. It cannot see buried utilities, sharp scrap, unstable banks, unexploded ordnance, crops, livestock, recent ground saturation or whether a hole can be recovered responsibly. On a beach it also cannot see tides, waves, surf, erosion, cliff risk or a safe exit route.
No treasure forecast
The weather model has no information about what is underground. A score of 95 does not make a find more likely than a score of 75, and a GO verdict says nothing about detector depth, mineralisation, interference or target quality. The useful promise is narrower: it helps choose a more workable time to spend outdoors.
A practical example
Suppose a three-hour field search looks mild and dry for the first two hours, but the final hour carries an 85% rain probability. A single-hour weather app might highlight the pleasant start. GoodDayTo treats that final hour as part of the plan, caps the entire three-hour window at NOT TODAY and looks for a later complete stretch. If the rain probability is 58% instead, it produces WAIT rather than pretending the uncertainty is a clean GO.
The same logic applies to duration. A half-day request must contain five continuous forecast hours. The Planner does not silently shorten it to two good hours, and its forecast facts show the highest rain risk, wind and gusts, the apparent-temperature range and whether daylight lasts throughout.
Permission and site checks come first
- Identify the owner or responsible authority and obtain any required permission before travelling or detecting.
- Check protected-site, heritage, park, beach, find-reporting and recovery rules for the exact location. Rules vary sharply between jurisdictions.
- Agree how finds and holes will be handled, stay inside the permitted boundary and stop if you encounter a suspected hazard.
- If thunder is heard or lightning is seen, leave the open site for a substantial building or enclosed metal-topped vehicle; a small shelter is not safe.
Responsible-use sources
For an example of detailed responsible practice, the Portable Antiquities Scheme publishes a Code of Practice for Responsible Metal Detecting in England and Wales. It begins with landowner or occupier permission and includes protected-site and reporting responsibilities. Local law still controls wherever you search.
Restrictions can be absolute. The US National Park Service explains that metal-detector possession or use is prohibited in National Park System areas under its resource-protection rules; check the authority responsible for your exact site rather than assuming public access means detecting access. For storms, the US National Weather Service says no place outside is safe when thunderstorms are in the area and advises waiting at least 30 minutes after the last thunder before resuming an outdoor activity.
Frequently asked questions
Does GoodDayTo know where metal detecting is legal?
No. A GO verdict covers forecast weather only. Permission, ownership, protected heritage, local law, access hours and digging rules must be checked with the relevant landowner or authority.
Is a little rain always bad for metal detecting?
No. A small rain signal creates caution rather than an automatic stop. Persistent rain or high rain probability anywhere in the chosen session can lower the complete window to WAIT or NOT TODAY.
Can I use this for beach metal detecting?
Use it for air weather only. It does not measure tides, waves, surf, erosion, safe access, local beach rules or whether detecting and recovery are allowed there.
Why does darkness lower the score?
Daylight helps you see holes, trip hazards, boundaries and other people. If any hour of the chosen session falls after dark, that lower daylight fit applies to the whole session.
Does GO mean it is safe to dig?
No. GO is not digging clearance. Buried services, sharp objects, unstable ground, unexploded ordnance and other site hazards are outside the weather forecast.
Does the score predict whether I will find anything?
No. It predicts neither finds nor detector performance. It only compares forecast comfort and practicality for spending the requested time outdoors.
Why can wind matter for metal detecting?
Wind is mainly a comfort and control factor, especially on open fields and beaches. GoodDayTo becomes cautious in stronger wind and gusts but cannot know how sheltered your exact site is.