Two environmental factors shape every match outcome before a tackle is even made: weather (pre-rolled at fixture creation and visible as a forecast) and home advantage (a small but real boost for the home franchise).
Weather (5 forecast conditions + 1 transition state)
Each fixture has one of 5 forecast values locked in when the round is drawn: fine, cloudy, light rain, rain, windy. Distribution across all games: fine ~44%, cloudy ~22%, light rain ~11%, rain ~11%, windy ~11%. A sixth state — damp — only appears mid-match as rain eases off; it's never on the forecast UI and never starts a game.
There's a 15% chance the weather shifts at half-time, plus an occasional mid-half change — but transitions are stepped: heavy rain never jumps straight to fine in 15 minutes. The graph is rain → light rain → damp → fine, where damp is a wet pitch with no falling rain (residual handling penalty). Squalls roll IN the same way: fine → light rain → rain.
You can see the forecast in advance on your Next Game card and the game plan submission form — the forecast becomes more accurate as kickoff approaches (40% at 7 days out, 80% at 24 hours, 95% at gametime). See "Can I see the weather for upcoming games?" for the full forecast mechanic.
Fine / Cloudy
No modifiers. Best conditions for skilful, expansive footy. The default reference point.
Light rain
- +8% errors
- −15% offloads
- −5% tries / −8% line breaks
- +15% forward carries
- −10% back carries
Damp (residual)
- +5% errors
- −8% offloads
- −3% tries / −4% line breaks
- +8% forward carries
- −5% back carries
Only appears as a transition state after rain has stopped — never rolled at fixture creation, so you won't see it on the forecast.
Heavy rain
- +15% errors (wet ball)
- −35% offloads
- −10% tries / −15% line breaks
- +30% forward carries
- −20% back carries
Windy
Wind direction matters per half:
- With wind: +10m kicks, +8% conv/PG/FG, +40% 40/20 chance
- Into wind: opposite — −10m kicks, +10% errors, −40% 40/20
Direction flips at half-time.
If the forecast (or scout report) suggests rain is likely, lean on your forwards. Wet weather actively shifts the carry distribution toward forwards (+30% in heavy rain). A team with a strong forward pack is much more wet-weather proof than a back-heavy team.
Home advantage
Every home franchise gets a small performance boost applied across the simulation. It's small but real — it shifts ~50/50 matches toward the home side and can be the difference in a tight finish.
Higher-seeded finals teams play at home in week 1 of finals as a reward for ladder position. The grand final is at a neutral venue.
Referee personality
One more rolled-per-game factor: every match has a referee with one of three personalities, randomly assigned at kickoff:
- Strict (25% of games): 1.15–1.30x penalty rate. Both teams concede more penalties.
- Balanced (50% of games): 0.90–1.10x — the typical NRL ref.
- Lenient (25% of games): 0.70–0.90x — lets a lot of stuff go.
You can't see the ref personality in advance — it's revealed implicitly through the match commentary and penalty count. A strict ref + low-discipline team is a recipe for sin bins.
Viewing Weather Forecasts
Every scheduled fixture has a weather forecast that becomes more accurate as game day approaches. You see it in two places:
- Next Game card on your home dashboard — a small weather line underneath the stadium, showing the current forecast plus a confidence level and countdown.
- Game Plan submission form — a prominent banner at the top of the plan form with the weather, an icon, the confidence level, and a one-line strategic hint. Use this to shape your attack style, defence intensity, kick direction, and goal kicker choice for the conditions.
How accurate is the forecast?
The forecast tightens as kickoff approaches, mirroring real weather forecasting:
- A week out: highly uncertain — the forecast can easily be wrong, treat it as directional only
- Several days out: starting to firm up, but still worth revisiting closer to gameday
- Day before kickoff: high confidence, but not certain
- Hours before kickoff: near-certain
- After kickoff: shows the actual weather the game was played in
Behind the scenes, each fixture has a locked "true" weather assigned when the round is drawn. The sim will always play the game in that true weather — what tightens is the forecast display, not the reality.
When the forecast is wrong, how wrong is it?
Wrong forecasts are "close" wrong, not wildly wrong. A rainy day is far more often mispredicted as "light rain" or "cloudy" than as "fine", just like real-world forecasts. So even at long range when the forecast is least reliable, the direction of the forecast gives you meaningful signal — if it says wet, it's more likely to actually be wet than dry.
The forecast is stable within a single calendar day — refreshing the page won't change what you see. But the forecast can refresh once per day as accuracy tightens, so the value you see on Tuesday may legitimately differ from what you see on Wednesday. This mirrors the behaviour of real weather forecasts firming up over time.
When should I commit to a wet-weather plan?
Game plans can be submitted right up until kickoff, so you don't have to commit early. Later is better. A forecast you see several days out is speculative — by the final day, it's much more trustworthy, and within a few hours of kickoff it's essentially locked in. If you're agonising over whether to pick a wet-weather roster early in the week, the safer play is to wait and re-check the forecast closer to gameday before finalising.
Mid-match weather changes
Even with an accurate forecast, the engine can still shift the weather at half-time (or, less often, mid-half). It's uncommon but not rare. The forecast predicts the starting weather, not necessarily the whole match.
Transitions are stepped. Heavy rain never jumps straight to fine — the graph is rain → light rain → damp → fine. Damp is a wet-pitch residual state: no falling rain, but the surface and ball are still slick. So a forecast of "rain" is never wasted: even if the rain stops at halftime, the second half will still play in light rain or damp conditions, not back to a perfect track. The post-match summary shows both halves' weather (e.g. "Rain → Damp") so you can see exactly what was played in.
If you're building a wet-weather specialist bench, a fine-forecast game isn't a complete waste — there's always a small chance the match shifts conditions.
How to use it strategically
- Fine / Cloudy: no weather factor — play your preferred style.
- Light rain: expect more handling errors. A kicking or balanced attack is safer than running.
- Heavy rain: knock-ons spike, offloads get turned over. Kick for territory, grind up the middle, run a conservative defence.
- Windy: kick distance and field goals are affected. Double-check your kick direction setting and consider whether your designated goal kicker is still the best pick.